New Features:

• Automatic Screen Rotation
• Support for new combo memory

Browser:

• Improvement when creating a voice call from WAP page.
• Improvements to embedded video functionality in browser.
• Sending email via browser flash plugin improvements.

Messaging:

• Mail in HTML format handling from Gmail IMAP server improved.

Connectivity:

• WLAN connection stability improvements
• BT connection stability improvements with certain BT headsets
• USB connection stability improvements

Telephony:

• Voice call handling improvements after certain type U.S.S.D message receiving.
• Stability improvements to gallery for case when there's lot of content in Gallery
• Improvements to switch application
• Voicemail icon handling improvements

Localization corrections:

• Deletion of all contacts now possible even more than 6000 contacts in phonebook
• Startup functionality improvements

[Source: Symbian-Freak]