Good Afternoon,
We have been working through this issue for the past year pretty much and over that time we've migrated to a new Mac OS X 10.9.5 Server and up to CC14 and we are still experiencing this error randomly with our Photoshop users. We have users that use Dreamweaver very heavily on the same server and have never seen this issue, therefor we are pretty certain it is isolated to Photoshop. We've also been able to test back to CS6 also having this issue.
Here is a screenshot of the error users will get after opening of file off the server (doesn't matter if its AFP or SMB) and trying to save any changes they have made:
We initially thought this was an issue on one of our older Windows servers that utilized ExtremeZIP, but since we've moved completed over to a Mac server we have been able to rule that out. We've also opened up a case with Apple Engineering have been able to show that all our permissions are set correctly and that it doesn't appear to be an Apple issue.
When our users get the above error they basically have to save the file as a new version and then go back and TRY to delete the old version, as they usually get the following error:
This has been a very long on-going issue and our users are really getting fed up as it is causing a lot of setbacks and reduction of being able to fully utilize their time. We've been able to duplicate this issue on all the OS's we have on campus including Mac OS X 10.8.5, 10.9.5 and 10.10.2.
If an email is provided I can send a sysdiagnose file over and ls -lae0 output of the server if needed.
Thank you,
Joshua B Roskos
Lands' End | Apple Systems Administrator