- Fixed several security issues.
- Fixed several stability issues.
- Many users experienced an issue where a corrupt local database caused Firefox to “lose” its stored cookies.
- Fixed an issue where, starting with Firefox 3.0.7, inline image attachments on popular webmail services (like AOL and AIM) would not display.
- Large forms would sometimes take a long time to submit.
- In certain cases, new windows would not have proper focus.
- full changelog

Security
- Fixed an issue where specially crafted JPEG images ccould be used to execute arbitrary code, as reported by Tavis Ormandy of the Google Security Team; see our advisory
- Fixed an issue where plug-ins could be used to allow cross domain scripting, as reported by Adam Barth; details will be disclosed at a later date.
- Fixed a moderately severe issue; details will be disclosed at a later date.
- Added support for the following platform-specific features:
- DEP (Data Execution Prevention) in Microsoft WindowsXP® with Service Pack 2 and higher and Microsoft Windows Server 2003® with Service Pack 1
- ASLR (Address Space Layout Randomization) in Microsoft Windows Vista®
- Added Untrusted Rootstore Capability:
- Opera downloads only the detailed information about untrusted (blacklisted) certificates when they are encountered
- If download fails for certificate information in the list, Opera considers any certificate matching the ID as untrusted
- Added version conditional fetching of certificate dependencies from an online repository
- Fixed a problem downloading the CRL (Certificate Revocation List)
- Fixed a problem that could cause SSL to deadlock in one state, hanging the connection
- Fixed a problem that could cause the incorrect calculation of Certificate IDs
- Implemented Extended Validation (EV) for cross-signed EV Root Certificates not shipped by default
- Implemented preshipping of the Entrust 2048 CA (Certificate Authority)
- Implemented Root Certificate fetching from an online repository when an intermediate matches a certificate in the repository
- Improved support for weak encryption when importing .p12 private certificates
- Prevented security information documents from being written to disk

Miscellaneous
- Fixed a problem which created separate feed notifications; Opera now groups them together
- Fixed a problem with inline find when no content was entered and the Enter key was pressed
- Implemented opacity on text styled with hexidecimal color codes
- Installing an external source viewer no longer requires an Opera restart
- Installing Opera sets it as the default browser; this may be reset during the install process

[Core]
* Redesigned browser framework and added new anti-freeze feature

[Plugin and External Tools]
* Improved plugin security. Security id is no longer accessible in max.src. Existing Script/HTML plugins are not affected, individual COM plugins could obtain the security id through a new putSecurityId method if necessary.

[Interface]
* Added clean browser history option in the exit confirmation dialog
* Added a save as option in Collector, support ANSI, Unicode, and UTF-8 txt format
* Added a notice window when cleaning browser history
* Fixed a GDI leakage when tab is dragged
* Fixed a favorites and RSS sidebar focus problem
* Fixed a Maximize problem in mult-monitor environment
* Fixed a Float Button position problem under Split View
* Fixed a RSS duplicate addition alert problem
* Fixed a freeze problem when the shadow of menu is clicked
* The URL of favorites is shown when mouse hover favorites sidebar
* The close button on the active tab now works on mouse released (previously when mouse pressed)

[Capture]
* Fixed problem capturing long web pages

[Others]
* Fixed a zoom problem under IE8
* Fixed a freeze problem when maxthon exits
* Fixed a Magic Fill auto fill problem
* Fixed problem opening .url shortcut
* Fixed some browser window focus problems
* Fixed some memory leakage problem
* Possibly fixed problem that browser frame may not be drawn
* Possibly fixed problem that browser window may go behind other windows when opening external url
* Improved page scrolling efficiency
* Web page zoom ratio is limited between 10% to 1000%

[General]
* fixed magic fill data lose problem under some circumstances
* fixed some ntdll related problems
* fixed a problem which may cause IMM32.dll error on exit
* fixed extra blank tab problem when opened by external applications
* can drag drop external document when no tab is opened on startup
* fixed a problem that Paste & Go in address bar with shortcut may initiate search
* fixed that timed out links are reported as working in favorites checking

[Interface]
* if simple collector is outside visible area, will be visible again after restart
* auto refresh frequency is shown auto refresh menu
* fixed a favorites bar display problem after delete of favorite
* fixed freeze problem after enable/disable split view repeatedly
* will show New Tab button if no tab is opened on startup
* Fixed a Undo items counting problem
* Feed are renamed to RSS for uniformity

[Find In Page]
* fixed a performance problem
* removed finding hidden search for improved performance

[Capture]
* default saving format is changed to JPG

[AdHunter]
* fixed a floating ad problem

[Maxthon Downloader]
* fixed a batch download speed problem