I hate it when i'm using a programme and decide that I need to use another one in a minute so I start it up, go back to the original programme and then use it for a bit. Then all of a sudden programme no 2 pushes programme no 1 out of the way, like an impatient prick, and is like all 'uuuhhhh use me now!'. Wait your fuckin turn you pushy bastard.

I also hate in yahoo mail when you scroll down and it says 'this message has been truncated - click here to see full message', so you click on it and it sends you all the way back up to the top of the message.