Correct inline docs for hybrid_get_sidebar_name().
Drop all pre-2.0 deprecated functions. Give "removed" status to all 2.0 functions that were dropped.
Remove the Color Palette and Theme Fonts extensions. These extensions never panned out.  They need complete overhauls in order to even come close to being viable solutions.
Don't call the theme-fonts.php or color-palette.php files.
Inline docs and code formatting cleanup.
Use printf().
Add the hybrid_single_author_title() function to match the other hybrid_single_*_title() functions.
Use hybrid_get_min_suffix().
Use function_exists( 'get_the_image' ) rather than checking for theme support.
Remove the $attributes parameter from hybrid_attr() and hybrid_get_attr().

See: https://github.com/justintadlock/hybrid-core/issues/54
Remove meta box description. We shouldn't need to explain the functionality.