[Galaxy S Advance I9070 Q&A, Help & Troubleshooting] Sami Kabir:
By default Samsung's TouchWiz UI uses a "Dark" theme... We know that there is a "hidden" "White" theme option available in framework-res.apk.. So while going through Arrays.xml in my framework-res.apk I came across this:

<array name="preloaded_drawables">
<item>@drawable/toast_frame_holo</item>
<item>@drawable/btn_check_on_pressed_holo_light</item>
<item>@drawable/btn_check_on_pressed_holo_dark</item>
<item>@drawable/btn_check_on_holo_light</item>
<item>@drawable/btn_check_on_holo_dark</item>
<item>@drawable/btn_check_on_focused_holo_light</item>
<item>@drawable/btn_check_on_focused_holo_dark</item>
<item>@drawable/btn_check_on_disabled_holo_light</item>
<item>@drawable/btn_check_on_disabled_holo_dark</item>
<item>@drawable/btn_check_on_disabled_focused_holo_light</item>
<item>@drawable/btn_check_on_disabled_focused_holo_dark</item>
<item>@drawable/btn_check_off_pressed_holo_light</item>
<item>@drawable/btn_check_off_pressed_holo_dark</item>
<item>@drawable/btn_check_off_holo_light</item>
<item>@drawable/btn_check_off_holo_dark</item>
<item>@drawable/btn_check_off_focused_holo_light</item>
<item>@drawable/btn_check_off_focused_holo_dark</item>
<item>@drawable/btn_check_off_disabled_holo_light</item>
<item>@drawable/btn_check_off_disabled_holo_dark</item>
<item>@drawable/btn_check_off_disabled_focused_holo_light</item>
<item>@drawable/btn_check_off_disabled_focused_holo_dark</item>
<item>@drawable/btn_check_holo_light</item>
<item>@drawable/btn_check_holo_dark</item>
<item>@drawable/btn_radio_on_pressed_holo_light</item>
<item>@drawable/btn_radio_on_pressed_holo_dark</item>
<item>@drawable/btn_radio_on_holo_light</item>
<item>@drawable/btn_radio_on_holo_dark</item>
<item>@drawable/btn_radio_on_focused_holo_light</item>
<item>@drawable/btn_radio_on_focused_holo_dark</item>
<item>@drawable/btn_radio_on_disabled_holo_light</item>
<item>@drawable/btn_radio_on_disabled_holo_dark</item>
<item>@drawable/btn_radio_on_disabled_focused_holo_light</item>
<item>@drawable/btn_radio_on_disabled_focused_holo_dark</item>
<item>@drawable/btn_radio_off_pressed_holo_light</item>
<item>@drawable/btn_radio_off_pressed_holo_dark</item>
<item>@drawable/btn_radio_off_holo_light</item>
<item>@drawable/btn_radio_off_holo_dark</item>
<item>@drawable/btn_radio_off_focused_holo_light</item>
<item>@drawable/btn_radio_off_focused_holo_dark</item>
<item>@drawable/btn_radio_off_disabled_holo_light</item>
<item>@drawable/btn_radio_off_disabled_holo_dark</item>
<item>@drawable/btn_radio_off_disabled_focused_holo_light</item>
<item>@drawable/btn_radio_off_disabled_focused_holo_dark</item>
<item>@drawable/btn_default_pressed_holo_light</item>
<item>@drawable/btn_default_pressed_holo_dark</item>
<item>@drawable/btn_default_normal_holo_light</item>
<item>@drawable/btn_default_normal_holo_dark</item>
<item>@drawable/btn_default_focused_holo_light</item>
<item>@drawable/btn_default_focused_holo_dark</item>
<item>@drawable/btn_default_disabled_holo_light</item>
<item>@drawable/btn_default_disabled_holo_dark</item>
<item>@drawable/btn_default_disabled_focused_holo_light</item>
<item>@drawable/btn_default_disabled_focused_holo_dark</item>
<item>@drawable/btn_default_holo_dark</item>
<item>@drawable/btn_default_holo_light</item>
<item>@drawable/btn_star_off_normal_holo_light</item>
<item>@drawable/btn_star_on_normal_holo_light</item>
<item>@drawable/btn_star_on_disabled_holo_light</item>
<item>@drawable/btn_star_off_disabled_holo_light</item>
<item>@drawable/btn_star_on_pressed_holo_light</item>
<item>@drawable/btn_star_off_pressed_holo_light</item>
<item>@drawable/btn_star_on_focused_holo_light</item>
<item>@drawable/btn_star_off_focused_holo_light</item>
<item>@drawable/btn_star_on_disabled_focused_holo_light</item>
<item>@drawable/btn_star_off_disabled_focused_holo_light</item>
<item>@drawable/btn_star_holo_light</item>
<item>@drawable/btn_star_off_normal_holo_dark</item>
<item>@drawable/btn_star_on_normal_holo_dark</item>
<item>@drawable/btn_star_on_disabled_holo_dark</item>
<item>@drawable/btn_star_off_disabled_holo_dark</item>
<item>@drawable/btn_star_on_pressed_holo_dark</item>
<item>@drawable/btn_star_off_pressed_holo_dark</item>
<item>@drawable/btn_star_on_focused_holo_dark</item>
<item>@drawable/btn_star_off_focused_holo_dark</item>
<item>@drawable/btn_star_on_disabled_focused_holo_dark</item>
<item>@drawable/btn_star_off_disabled_focused_holo_dark</item>
<item>@drawable/btn_star_holo_dark</item>
<item>@drawable/btn_toggle_on_pressed_holo_light</item>
<item>@drawable/btn_toggle_on_pressed_holo_dark</item>
<item>@drawable/btn_toggle_on_normal_holo_light</item>
<item>@drawable/btn_toggle_on_normal_holo_dark</item>
<item>@drawable/btn_toggle_on_focused_holo_light</item>
<item>@drawable/btn_toggle_on_focused_holo_dark</item>
<item>@drawable/btn_toggle_on_disabled_holo_light</item>
<item>@drawable/btn_toggle_on_disabled_holo_dark</item>
<item>@drawable/btn_toggle_on_disabled_focused_holo_light</item>
<item>@drawable/btn_toggle_on_disabled_focused_holo_dark</item>
<item>@drawable/btn_toggle_off_pressed_holo_light</item>
<item>@drawable/btn_toggle_off_pressed_holo_dark</item>
<item>@drawable/btn_toggle_off_normal_holo_light</item>
<item>@drawable/btn_toggle_off_normal_holo_dark</item>
<item>@drawable/btn_toggle_off_focused_holo_light</item>
<item>@drawable/btn_toggle_off_focused_holo_dark</item>
<item>@drawable/btn_toggle_off_disabled_holo_light</item>
<item>@drawable/btn_toggle_off_disabled_holo_dark</item>
<item>@drawable/btn_toggle_off_disabled_focused_holo_light</item>
<item>@drawable/btn_toggle_off_disabled_focused_holo_dark</item>
<item>@drawable/btn_toggle_holo_light</item>
<item>@drawable/btn_toggle_holo_dark</item>
<item>@drawable/edit_text_holo_light</item>
<item>@drawable/edit_text_holo_dark</item>
<item>@drawable/text_cursor_holo_light</item>
<item>@drawable/text_cursor_holo_dark</item>
<item>@drawable/text_select_handle_left</item>
<item>@drawable/text_select_handle_right</item>
<item>@drawable/text_edit_paste_window</item>
<item>@drawable/expander_close_holo_dark</item>
<item>@drawable/expander_close_holo_light</item>
<item>@drawable/expander_group_holo_dark</item>
<item>@drawable/expander_group_holo_light</item>
<item>@drawable/list_selector_holo_dark</item>
<item>@drawable/list_selector_holo_light</item>
<item>@drawable/list_section_divider_holo_light</item>
<item>@drawable/list_section_divider_holo_dark</item>
<item>@drawable/menu_hardkey_panel_holo_dark</item>
<item>@drawable/menu_hardkey_panel_holo_light</item>
<item>@drawable/menu_submenu_background</item>
<item>@drawable/menu_dropdown_panel_holo_light</item>
<item>@drawable/menu_dropdown_panel_holo_dark</item>
<item>@drawable/overscroll_edge</item>
<item>@drawable/overscroll_glow</item>
<item>@drawable/popup_inline_error_above_holo_dark</item>
<item>@drawable/popup_inline_error_above_holo_light</item>
<item>@drawable/popup_inline_error_holo_dark</item>
<item>@drawable/popup_inline_error_holo_light</item>
<item>@drawable/spinner_16_outer_holo</item>
<item>@drawable/spinner_16_inner_holo</item>
<item>@drawable/spinner_48_outer_holo</item>
<item>@drawable/spinner_48_inner_holo</item>
<item>@drawable/spinner_76_outer_holo</item>
<item>@drawable/spinner_76_inner_holo</item>
<item>@drawable/progress_bg_holo_dark</item>
<item>@drawable/progress_bg_holo_light</item>
<item>@drawable/progress_horizontal_holo_dark</item>
<item>@drawable/progress_horizontal_holo_light</item>
<item>@drawable/progress_indeterminate_horizontal_holo</item>
<item>@drawable/progress_large_holo</item>
<item>@drawable/progress_medium_holo</item>
<item>@drawable/progress_primary_holo_dark</item>
<item>@drawable/progress_primary_holo_light</item>
<item>@drawable/progress_secondary_holo_dark</item>
<item>@drawable/progress_secondary_holo_light</item>
<item>@drawable/progress_small_holo</item>
<item>@drawable/scrubber_progress_horizontal_holo_dark</item>
<item>@drawable/scrubber_progress_horizontal_holo_light</item>
<item>@drawable/background_holo_light</item>
<item>@drawable/background_holo_dark</item>
<item>@drawable/screen_background_dark</item>
<item>@drawable/screen_background_dark_transparent</item>
<item>@drawable/screen_background_light</item>
<item>@drawable/screen_background_light_transparent</item>
<item>@drawable/screen_background_selector_dark</item>
<item>@drawable/screen_background_selector_light</item>
<item>@drawable/scrollbar_handle_holo_dark</item>
<item>@drawable/scrollbar_handle_holo_light</item>
<item>@drawable/spinner_background_holo_dark</item>
<item>@drawable/spinner_background_holo_light</item>
<item>@drawable/spinner_ab_default_holo_dark</item>
<item>@drawable/spinner_ab_default_holo_light</item>
<item>@drawable/spinner_ab_disabled_holo_dark</item>
<item>@drawable/spinner_ab_disabled_holo_light</item>
<item>@drawable/spinner_ab_focused_holo_dark</item>
<item>@drawable/spinner_ab_focused_holo_light</item>
<item>@drawable/spinner_ab_pressed_holo_dark</item>
<item>@drawable/spinner_ab_pressed_holo_light</item>
<item>@drawable/spinner_ab_holo_dark</item>
<item>@drawable/spinner_ab_holo_light</item>
<item>@drawable/spinner_default_holo_dark</item>
<item>@drawable/spinner_default_holo_light</item>
<item>@drawable/spinner_disabled_holo_dark</item>
<item>@drawable/spinner_disabled_holo_light</item>
<item>@drawable/spinner_focused_holo_dark</item>
<item>@drawable/spinner_focused_holo_light</item>
<item>@drawable/spinner_pressed_holo_dark</item>
<item>@drawable/spinner_pressed_holo_light</item>
<item>@drawable/cab_background_bottom_holo_dark</item>
<item>@drawable/cab_background_top_holo_light</item>
<item>@drawable/cab_background_bottom_holo_light</item>
<item>@drawable/ic_cab_done_holo_dark</item>
<item>@drawable/cab_background_top_holo_dark</item>
<item>@drawable/ic_cab_done_holo_light</item>
<item>@drawable/btn_cab_done_default_holo_dark</item>
<item>@drawable/btn_cab_done_focused_holo_light</item>
<item>@drawable/btn_cab_done_default_holo_light</item>
<item>@drawable/btn_cab_done_pressed_holo_dark</item>
<item>@drawable/btn_cab_done_focused_holo_dark</item>
<item>@drawable/btn_cab_done_pressed_holo_light</item>
<item>@drawable/btn_cab_done_holo_light</item>
<item>@drawable/btn_cab_done_holo_dark</item>
<item>@drawable/ic_menu_close_clear_cancel</item>
<item>@drawable/ic_menu_copy_holo_dark</item>
<item>@drawable/ic_menu_copy_holo_light</item>
<item>@drawable/ic_menu_cut_holo_dark</item>
<item>@drawable/ic_menu_cut_holo_light</item>
<item>@drawable/ic_menu_more</item>
<item>@drawable/ic_menu_moreoverflow_holo_dark</item>
<item>@drawable/ic_menu_moreoverflow_holo_light</item>
<item>@drawable/ic_menu_paste_holo_dark</item>
<item>@drawable/ic_menu_paste_holo_light</item>
<item>@drawable/ic_menu_selectall_holo_light</item>
<item>@drawable/ic_menu_selectall_holo_dark</item>
<item>@drawable/ic_clear</item>
<item>@drawable/ic_clear_disabled</item>
<item>@drawable/ic_clear_normal</item>
<item>@drawable/ic_search</item>
<item>@drawable/ic_go</item>
<item>@drawable/ic_voice_search</item>
<item>@drawable/dialog_bottom_holo_dark</item>
<item>@drawable/dialog_bottom_holo_light</item>
<item>@drawable/dialog_full_holo_dark</item>
<item>@drawable/dialog_full_holo_light</item>
<item>@drawable/dialog_middle_holo_dark</item>
<item>@drawable/dialog_middle_holo_light</item>
<item>@drawable/dialog_top_holo_dark</item>
<item>@drawable/dialog_top_holo_light</item>
<item>@drawable/ic_dialog_alert_holo_dark</item>
<item>@drawable/ic_dialog_alert_holo_light</item>
<item>@drawable/list_divider_holo_dark</item>
<item>@drawable/list_divider_holo_light</item>
<item>@drawable/list_divider_holo_light</item>
<item>@drawable/ic_lockscreen_chevron_left</item>
<item>@drawable/ic_lockscreen_chevron_right</item>
<item>@drawable/ab_transparent_dark_holo</item>
<item>@drawable/ab_stacked_transparent_dark_holo</item>
<item>@drawable/ab_bottom_transparent_dark_holo</item>
<item>@drawable/ab_solid_dark_holo</item>
<item>@drawable/ab_stacked_solid_dark_holo</item>
<item>@drawable/ab_bottom_solid_dark_holo</item>
<item>@drawable/ab_transparent_light_holo</item>
<item>@drawable/ab_stacked_transparent_light_holo</item>
<item>@drawable/ab_bottom_transparent_light_holo</item>
<item>@drawable/ab_solid_light_holo</item>
<item>@drawable/ab_stacked_solid_light_holo</item>
<item>@drawable/ab_bottom_solid_light_holo</item>
<item>@drawable/ab_solid_shadow_holo</item>
<item>@drawable/item_background_holo_dark</item>
<item>@drawable/item_background_holo_light</item>
<item>@drawable/ic_ab_back_holo_dark</item>
<item>@drawable/ic_ab_back_holo_light</item>
<item>@drawable/fastscroll_thumb_holo</item>
<item>@drawable/fastscroll_thumb_pressed_holo</item>
<item>@drawable/fastscroll_thumb_default_holo</item>
<item>@drawable/fastscroll_track_holo_dark</item>
<item>@drawable/fastscroll_track_pressed_holo_dark</item>
<item>@drawable/fastscroll_track_default_holo_dark</item>
<item>@drawable/fastscroll_label_left_holo_dark</item>
<item>@drawable/fastscroll_label_right_holo_dark</item>
<item>@drawable/fastscroll_track_holo_light</item>
<item>@drawable/fastscroll_track_pressed_holo_light</item>
<item>@drawable/fastscroll_track_default_holo_light</item>
<item>@drawable/fastscroll_label_left_holo_light</item>
<item>@drawable/fastscroll_label_right_holo_light</item>
<item>@drawable/editbox_dropdown_background_dark</item>
<item>@drawable/textfield_searchview_holo_dark</item>
<item>@drawable/textfield_searchview_right_holo_dark</item>
<item>@drawable/textfield_searchview_holo_light</item>
<item>@drawable/textfield_searchview_right_holo_light</item>
<item>@drawable/textfield_search_selected_holo_dark</item>
<item>@drawable/textfield_search_default_holo_dark</item>
<item>@drawable/textfield_search_right_selected_holo_dark</item>
<item>@drawable/textfield_search_right_default_holo_dark</item>
<item>@drawable/textfield_search_selected_holo_light</item>
<item>@drawable/textfield_search_default_holo_light</item>
<item>@drawable/textfield_search_right_selected_holo_light</item>
<item>@drawable/textfield_search_right_default_holo_light</item>
<item>@drawable/tab_indicator_holo</item>
<item>@drawable/tab_unselected_holo</item>
<item>@drawable/tab_selected_holo</item>
<item>@drawable/tab_unselected_focused_holo</item>
<item>@drawable/tab_selected_focused_holo</item>
<item>@drawable/tab_unselected_pressed_holo</item>
<item>@drawable/tab_selected_pressed_holo</item>
<item>@drawable/quickcontact_badge_overlay_dark</item>
<item>@drawable/quickcontact_badge_overlay_normal_dark</item>
<item>@drawable/quickcontact_badge_overlay_pressed_dark</item>
<item>@drawable/quickcontact_badge_overlay_light</item>
<item>@drawable/quickcontact_badge_overlay_normal_light</item>
<item>@drawable/quickcontact_badge_overlay_pressed_light</item>
<item>@drawable/tw_background_holo_dark</item>
</array>

Seems that a lot of PNG files are loaded, including the "white or light" theme's images also.. so what if I get rid of all the items that ends with "light".. I am not planning to enable the White theme so will it cause any noticeable effects like faster overall UI or some Force closes or something?