I can't tell you exactly when this happened but I think TinkerTools might have been the cause of it. The Macintosh HD is filled with these strange folder names that i have no idea what they might be... they sorta resemble registry keys in Windows. I'm currently using OS X 10.5.4, white MacBook 13" I have re-installed TinkerTools and had it made some changes and reverted the commands by resetting it to default but that still didn't fix it. Has anybody seen this type of file or folder names? Can I delete them without causing major havoc on my already abused MacBook?