Yes, they sometimes do. The messages you are receiving are typical, although I don't recall hearing about problems with JPEG's, just PSD and TIFF files that have layers or which include the use of features not found in earlier versions.
Dave, you ~really~ should join the Adobe User-toUser forums. You will get better answers to your question, and I guarantee that you will learn a lot. The Photoshop list offers a few tidbits now and then, but is nowhere near as information rich as the User forums. A few of the developers and engineers for Photoshop frequent the place and offer their help as well. http://www.adobe.com/support/forums/main.html Shel > [Original Message] > From: Dave Brooks > Do earlier versions of PS have problems opening up files from newer versions.? > > The logo i'm doing was done on the ibook (PSCS)G4 OSX. I saved as a Jpg ( I didi not merge any layers)and moved it to my PC Windows XP Home SP 2. > When i went to open in PS 7 it gave me an eror of not enough memeory to open. The file is only 68K. > However it would open in PSEL3 but i could not do anything to it as it said the layers were locked. > > Any tips.? > > I have one more thing to add to the logo, and now i have problems??? Go fiqure.LOL I 'll finish it in CS on the ibook, just curious whats happening here. > > Dave > > > David J Brooks > Equine, Pets, Bands, Rural Landscape Photography in York Region > www.caughtinmotion.com > Pentax istD, PZ-1, Nikon D1 D2H