Sorry for my brief post but I was typing on my N800 and getting annoyed a the same time.

Ok, here is whats happening. Each time I select either a new application, or an update to an existing application, application manager opens up, it starts to download and it either stalls at the downloaded (i.e. the messgae box says downloaded 171kb, the progress bar is full, and nothing happens) or the error is 'application failed to install. I decided to remove an existing application and re-install it, and i couldn't re-install it (usb control).
I also can't connect to my PC using USB, it always comes up with memory card in use.

So it might be the internal memory card? or the internal memory of the device?
Guess I should try a backup and a fresh sd card.

BT