Here are lists of important changes to the Starter template, so that template authors building their template on it, will find it easier to upgrade. (This will not list changes in the CSS, but mainly new files or changes in main.php or any specific functionality.)
None
tpl_toolsevent() instead of template's _tpl_toolsevent() (backwards-compatible, with fallback)detail.php, use tpl_img_meta() insteadNone
aside class to the sidebar (and made changes to CSS to make sidebar content styles re-usable outside of ID)_tpl_discussion() (in tpl_functions.php)detail.php:tpl_classes() to template PHP files (main.php, detail.php and mediamanager.php)_tpl_toolsevent(), i.e. the following three event hooks are now supported: TEMPLATE_USERTOOLS_DISPLAY, TEMPLATE_SITETOOLS_DISPLAY, TEMPLATE_PAGETOOLS_DISPLAYsidebar config option is not set and added hasSidebar class (changes to main.php, css/structure.css and css/mobile.css)images/external-link.png, deleted images/link_icon.gifimages/unc.png, deleted images/windows.gifimages/email.png, deleted images/mail_icon.gifcss/rtl.css (also from style.ini) and re-added them to the rest of the CSS filescss/mobile.css (also to style.ini)tagline config is superseded by core taglinesidebarID config is superseded by core sidebar user_tools, site_tools, page_tools and skip_to_content_tpl_include() to core tpl_includeFile()tpl_include_page() to use new tpl_sidebar() insteadtpl_include_page($conf['sidebar'], 1, 1))no-js class to <html> and script to change it to js_links.css to content.css
The sidebar function tpl_sidebar() was in the RC but was removed again from the actual release.
template.info.txt 1)_fileuploader.css, _mediamanager_fullscreen.css, _tabs.css (and added to style.ini)apple-touch-icon.png, resizecol.pngmain.php ⇒ tpl_action('media')__site_width__ CSS parameter to style.inidetail.php
In case you are upgrading from Rincewind to Angua, you can ignore this (as it's included in _mediamanager_fullscreen.css). But in case you already have upgraded your template between 2011-12-11 and 2011-11-20, the following small change fixes 2387:
_tpl_action()@id@ and @user@)_tpl_action('register')_mediamanager.css from the default template fulfills a completely different purpose, i.e. it's for the style for the fullscreen manager, while this is for the popup