I use Panther on laptop(wireless) and last night I tried to set up file sharing with my (9.2) tower with Airport base. I have tried this before and was not successful. Anyway..next thing I know...I had lost all my preference settings in all apps and Mail, even desktop appearance and keyboard settings. I had no mailboxes to import into Mail, and have to retrain my Junk Filter. I rebooted and am in the process of rebuilding all my settings. I fortunately had the codes for all the apps I have bought, had to call cable to help me set up Mail...lost my bookmarks and addresses. It was like everything was back to day one. Every setting was gone. I lost a project I was working on in Still Life. When I rebooted it..it said it was a demo until I registered. Same with other apps I ran. I ran Disk Utility and nothing unusual was there. Itunes EQ settings gone. Nothing in the trash. Is this a feature or a bug? Perhaps in certain situations..could be helpful, but not amusing and not very Mac-like not ask.."are you sure you want to delete every preference ever made...this action can not be reversed"...:(((( Any ideas ..oh gurus of EE.