I don't know about anybody else but I have been having a really annoying problem with the on screen keyboard. It seems like a crapshoot whenever I tap a search field or text box the keyboard blinks in and out while typing two or three times before it stays up.
And the two top corners bring down the taskbar, but you probably already knew that. If you hold down the shift button it activates caps lock. If you touch the wifi symbol on the task bar then touch the waves it brings you to the wifi settings....the same goes for battery and bluetooth.
I know this is completely unrelated but some cool features none the less.