OS2008 Feature Upgrade v. 4.2008.36-5 includes:

Improvements:

This release fixes issues with Browser stability and interoperability, improves Email, Flash and Connectivity reliability.

This Feature Upgrade is available as an in-device Seamless software update for N800 and N810 customers who have installed OS2008 Feature Upgrade v. 4.2008.23-14 or later, and as an installable SW image with the Nokia Internet Tablet SW Update Wizard.

OS2008 Feature Upgrade v. 4.2008.23-14 includes:

Seamless software update

After flashing this OS2008 Feature Upgrade further OS updates will be made available over-the-air. User will get notification about the availability of OS update in statusbar automatically when new updates are provided. This works only over WLAN connections. It is also possible to check for updates manually from Application manager.

The updated email application now supports simplified account setup and presets for various service providers.

Support for Chinese character rendering in Email, Browser and RSS feed reader.