Other changes include:
* A really annoying new on-screen keyboard layout where the backspace is in the bottom right instead of the top right.
* OSK is now a pop-up dialog instead of full screen, meaning smaller and harder to hit keys. Still entirely obscures anything behind it.
* Random changed behaviour with no indication of what to do. E.g. the 'application manager' no longer has a search facility, instead you just start typing what you want. Great, but why didn't it tell me that?
* Most built-in apps can be put in portrait mode by pressing CTRL+SHIFT+U and rotating the phone, but some become unusable when you do so. The OSK is landscape-only so when using portait mode, it will switch to landscape whenever you want to input text.
* The "Back" and "Bookmarks" buttons in the browser are swapped around, so I keep going back when I want to use my bookmarks.
Be it said that despite these niggles, the update has been an improvement. Many of the built in apps are more responsive, and the OS uses less space on the root file system (A major fault of the N900, is only having 256MB in the root filesystem, separate from the massive 32GB mass storage) so I now have 85MB free instead of just 20MB.
Skype video chat is a welcome addition, but only really usable on WiFi, especially if (like myself) you're on T-Mobile who packet-shape VoIP over 3G to the point of being unusable.