Hi, Today a strange Finder problem appeared on my iMac G5 running OS X 10.4.9! Suddenly, without a reason there are Authentication problems, that shouldn't be there because I'm the Admin and authenticate at login!!! Moving files from my external harddrive to the desktop causes the same problems! For example, if I try to move a file from a folder on the Desktop to the Desktop itself, an Error message pops up and I have to authenticate again! Furthermore, if I take a screenshot with grab or simply drag and drop a picture form the internet/safari to the Desktop, it doesn't appear at all?! Any ideas? Thanks in advance.