Fixed some javascript issues in front-end editing
Fixed PHP error under Joomla! 1.7
Updated the filebrowser to work also in front-end.
Fixed issue regarding the extra fields rendering in front-end editing
Fixed issue regarding the preselected category in front-end editing (menu link to item edit form)
Applied fix for K2 user plugin to not break other user plugins like CB
Fixed PHP warning regarding extra fields plugins in mod_k2_content
Removed some caching functionality to avoid conflicts with some plugins
Removed some caching functionality to avoid conflicts with some plugins
Updated the attachments upload function to permit  the "application/download" mime.
Modified the attachments download function to use a hash in order to prevent users from guessing IDs of attachments. The layout files that need to be modified are:

Front-end

1. components/com_k2/templates/default/category_item.php
2. components/com_k2/templates/default/item.php
3. modules/mod_k2_content/tmpl/Default/default.php

Administration

1. administrator/components/com_k2/views/item/default.php
Added custom code functionality for mod_k2_tools allowing administrators to add custom HTML, CSS, JS and even PHP code.
Fixed issue regarding the error that K2 generates when an item is not found.
Applied code to raise a not found error when no available view/controller is provided in the application.
Fixed issue regarding the item navigation under Joomla! 1.7
Fixed issue regarding the item navigation under Joomla! 1.7
Added code to fetch item images in latest from author block in item page.
Added flickr integration for K2 galleries (SIG Pro is required)
Added some delay to the initialization of the extra fields editors to play nice with latest JCE versions.
Style changes on item/category form sidebars.