В ответ на: With a third snapshot this week, you might have figured that we're very busy stabilizing and improving 10.5. Also this snapshot includes a major update of Presto with over a hundred of bug fixes and improvements. And to make it even better we expect to release more new milestones next week that will fix most of the regressions in 10.5. Who knows, there might be a new feature next week too :-)
In addition to the bugfixes, this build also includes support for the TLS Renegotiation Information Extension. This recent update in the TLS/SSL specification addresses a severe security vulnerability in the protocols. More details are provided on Opera's security blog. The Presto update also includes improved support for web fonts, including fixes for support of font-weight and font-style. The scope protocol has been updated which makes improvements in Dragonfly possible.
Apart from stability updates in Opera's rendering engine, a number of frequently reported bugs in the user interface have been fixed. In particular the autocompletion dropdown of the addressfield has gotten some attention. The visual styling of it has been improved and enhanced, and several quirks in it have been fixed.
Copy link still crashes Opera (yes it will be fixed)
Dragonfly is not working due to new protocol (expect it up and running next week)
Lots of crash fixes
improved address bar with dropdown button
Fixed: regression: redraw issues while scrolling textareas and
Fixed: Clicking a link in an external app doesn't open a new tab anymore
Improved support for webfonts
CORE-15970 New protocol layer for scope
Memory leak fixes
Google Reader now works
Text in transformed content displayed properly (windows)