Changelog is as following:
3.4.2.600 [2012-06-28]
New Features:
+ Supported saving pages as mht files in Ultra Mode
+ Added tooltip when extensions successfully installed
+ Reserved "Forward/Back " list and scroll bar position in Duplicate Tab
+ Added auto update and syncing service of extensions
+ Supported HTML5 color input
Fixes:
[Main Frame]
* Tool Bar display problem
* Icon display problem in Source Sniffer
[Webkit Core]
* Some language characters display problem
* No response problem of the browser
* Some ads were displayed by mistake
* Page display problem
* Some error pages did not show completely
* Proxy identity authentication did not work well
[Extension Platform]
* Right-click menu of extensions displayed errors
* Focus loss problem of extension windows