everytime I start up (tiger) i get a recovered files folder in the trash, whats in the folder varies from start up to start up. I saw this stuff bak in 9, but never in panther. so does anyone know if this is a bad thing that happens in tiger?
This apparently is normal behavior for the 10.4. With previous versions of OS X, whenever the system had to delete data like Mail attachments, the iChat cache, or some plists, it would just do it behind the scenes. Currently, with Tiger, this has changed, the deleted files are placed in the Recovered Files folder. On the next reboot you'll see them, giving you one chance to recover them, if needed.
In a way it's a built-in emergency backup method for recently used documents or ones you didn't want the system to delete without warning. It might be useful after a crash