Make sure admins know things can go wrong, MSSQL and Oracle were never working, fix block_html config saving issue, skip a lot more tables because the data there is serialised() or can not be changed in case of config tables, more warnings and checkbox confirmation.
Prevent moodle_url error, cleanup entity encoding and decoding, disable tex source view when TeX and Algebra plugins disabled, localise TeX source popup and prevent phishing attempts, fix executable permission of Algebra pearl script, prevent image error in tex debug when Tex/Ghostscript not configured properly, fix copyright blocks and phpdocs, improve coding style, fix wrong source display link in Algebra filter.
Bug fixes:
* fixed broken flash resizing via URL
* upgraded Flowplayer
* fixed invalid context in format_text()
* all media related CSS moved from themes to filter and resources
* fixed automatic pdf resizing in resources
Changes:
* reworked filter_mediaplugin system settings - grouped by player type instead of individual extensions, added more information
* improved regex url matching
* removed old unused players, Eolas fix and UFO embedding
* image embedding moved to filter_urltolink
* new Flowplayer embedding API
* accessibility and compatibility tweaks in Flowplayer
* SWF embedding now works only in trusted texts, it is now enabled by default (works everywhere if "Allow EMBED and OBJECT tags" enabled)
* new default video width and height
New features:
* automatic Flash video resizing using information from video metadata
* Flash HD video support (*.f4v)
* Flash video embedding with HTML5 fallback - compatible with iOS and other mobile devices
* Vimeo embedding
* no-cookie YouTube site supported
* HTML 5 audio and video with multiple source URLs and QuickTime fallback
* more video and audio extensions in filelib.php
* MP3 player colours customisable via CSS in themes
* nomediaplugin class in a tag prevents media embedding
Administrators can now specify $CFG->langcacheroot in their config.php for
alternative location of strings disk cache. If the alternative location is
not set, Moodle uses default $CFG->dataroot/cache/lang
