I have no idea why, but a .psd file I'm trying to open won't work anymore. I keep getting this message from Photoshop Elements: "Could not complete your request because the file is not compatible with this version of Photoshop" And from GIMP "Unexpected end of file while reading 'layer extra data block signature chunk" " "Photoshop image plug-in could not open image" These were working fine last night. I have been using the same two programs and same computer. Please help as I have been working on this project for 2-3 days. Thanks

Guesses include the file is damaged, your system has become unstable either in OS, hardware or firmware or application software. Kind of hard to tell where to start. I'd consider a live cd that has gimp and see if it will open the file. I suspect the file is really damaged. See if there are any backup files to this project. "Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10