Desktop/UI
Skin tweaking (more native default skin)
Fixed several common crashers reported via the crashlogging tool
Fixed DSK-273787 (Inline find toolbar uses Google search)
Fixed DSK-283210 (Drag & Drop in page broken)
Fixed DSK-283085 (Icons on customized status bar duplicated on upgrade)
Fixed DSK-279809 (Wrong accelerator key for CJK)
Fixed DSK-275798 (Chat notification appears even if chat tab is active)
Fixed DSK-278443 (Importing bookmarks imports a second "Trash" folder)
Fixed DSK-276834 (Ini file variables no longer working: %s, %t, %c, %u, %l)
Fixed DSK-279652 (Deleting bookmark closes/collapses all folders)
Fixed DSK-274429 (Focus lost when deleting bookmarks)
Fixed DSK-272965 (Plugins not moved to new window when dragging tab from a different window)
Fixed DSK-280340 (Use image on desktop doesn't work)
Fixed DSK-268249 ('Use Integrated Search' searches in google, not in the page)
Fixed DSK-280390 (The O menu button can reappear when the menu bar is enabled)
Fixed DSK-274949 (Icon remains in the system tray after closing Opera)
Fixed DSK-283422 (Crash on startup with old profile)
Fixed DSK-286209 (Crash when disabling "Encode international Web addresses with UTF-8)
Fixed DSK-279060 (Minimized tabs don't display after restart)
Fixed DSK-280780 (Favicon not added to bookmarks due to question mark in filename/path)
Fixed DSK-282359 (Icons missing from menus in 16-bit color mode)
Fixed DSK-285442 (Scrolling performance is slower in 10.50 than 10.10 on some configurations)
Fixed DSK-275546 (No main menu after upgrading)

Core
Fixed DSK-279742 (Incorrect font used for UTF8 page without lang specified)
Fixed DSK-284316 (Crashers when syncing against random Link data)
Fixed DSK-285606 (Opera Link fails to sync when item has no value for id or content attribute)
Fixed CARAKAN-1058 (Memory leak in Dromaeo tests)
Fixed CARAKAN-1138 (Crash when throwing exception from JIT-invoked eval())
Fixed CARAKAN-1141 (Crash on thejit.org demo (JIT only))
Fixed CARAKAN-779 (Incorrect toString of accessor properties)
Further Carakan crash fixes
Fixed CORE-28353 (Thread migration with cross-scheduler back references cause a crash)
Fixed CORE-28317 (Cookies received over NPAPI are incorrectly parsed): DnB NOR login fails
Fixed CORE-17989 (Should allow cookie mode override in ua.ini)
Fixed CORE-27420 (drawImage called with an image with non-existent source throws)
Fixed CORE-28379 (Crash when calling opera.io.filesystem.browseForDirectory() from widget)

Mail
Fixed DSK-255372 (Add functionality to get quote-marks from documentedit)
Fixed DSK-284837 (Attachments not accessible for sent messages)
Fixed DSK-284161 (Ghost e-mails in the Trash folder after emptying it and a restart of Opera)
Fixed DSK-286102 (Message not loaded when it's deselected and selected again)
Fixed DSK-284168 (Only possible to attach images after inserting an image in an HTML mail)
Fixed DSK-262824 (Missing inlined image when reopening draft when image has space in filename)
Fixed DSK-283465 (Mail is blank when using fit to width)
Fixed DSK-284781 (Attachments not sent if mail is sent quickly after attaching files)
Fixed DSK-283709 (Emails container has extra border)
Fixed DSK-270134 (Welcome mail in Opera Mail shows old logo)
Fixed DSK-275889 (Quotes missing in mail.css and webfeeds.html)
Fixed DSK-269693 (Missing option to move mail.css)
Fixed DSK-286863 (Opera Mail welcome e-mail message not localized)
Fixed CORE-28422 (Added possibility to get blockquotes as text)