I did work on my iMac last night (bought a 20" one year ago) and it has always worked perfect. I do have 2gb installed. All the sudden this happend (se the sceendump) and as soon as i open for example systemprefs och other apps it showed there. I did close all apps and then it still were in the dock. I did a restart but it did still happen. What in hell could this be? I have no clue at all what it could be... Please, if somebody elsle have whis problem, please tell me what to do!