One common example, easily overlooked, is when you open an image in one color space but convert it to your working space. Even if you made no edits, the colors have themselves been transformed so the file would indeed be seen to have changed.
Oops…no, I misread, but I’ll leave my earlier comment for whatever benefit it is.
In the case of the "disk copy has changed", what this usually means is that the file you have open in Photoshop has had the original file also opened in some other application and modified there. So, when you save the file from Photoshop you will be saving it as the original file with the PS edits applied only, and will lose whatever was performed on it and saved via the other application. To preserve both sets of edits, you’d save the working image in Photoshop under a different name and/or format.
Regards,
Daryl
Thank you for your knowledgeable reply. Sounds like We (my wife and I) have been using our network wrong. We repair our old family Photos.
Our work flow involves my computer (Pluto) and her computer (Mars) both run PS-CS3; Mars runs windows XP Pro; Pluto runs windows Vista. (1)I open and repair the picture, save and close (Pluto).
(2)She opens and colors with a Wacom Cintiq, then she is suppose to save and close (Mars). (3)I open and add enhancements and print and save. It is this last save that I SOMETIMES receive the message, do I want to save anyway.
I will run some tests, to see if I can repeat the message.
You should be Mars and she should be Venus.
That’s where your problem lies!
Could you explain that a little futher?
I should have stated that I also have an external hard drive, which is the only place where my pictures are stored. Mars and Pluto get there pictures from the external hard drive.
Adobe does not advocate, nor officially support opening and saving files across a network. Having the images on an external drive will only add to the problem.
It may well work fine 99% of the time, but you do risk file corruption.
The recommendation is to copy to your local drive, work on the image, save, then copy it back to the original network drive. Alternatively use Version Cue which ships with the suite.
:-)@JJ