Strange behaviour - PS CS4 and SL

[DRR]

Can't figure this one out. I have a multiple layer, multiple group PSD. It was created in CS4 under SL, and being edited under CS4/SL.

Open the file. Delete a group. Apple-W to close. A dialog comes up - Do you want to save changes before closing. Yes I do.

It thinks. Then tells me it can't write to testfile.psd because it was left open or in use. Ummm, yeah. PS is using it. WTF. No other apps use my PSDs. I have to save as testfile2.psd, then in the finder, delete testfile.psd and rename testfile2.psd to testfile.psd.

Is this reproduceable on anyone else's machine? No fonts, no vector data, just straight raster layered.

[M A V I C]

Network volume? Have you tried restarting?

I get this often when I did something like copy the file to my clipboard, or pasted it into an email.

[btfc]

Where is the file physically located?

[DRR]

Local disk. Internal hard drive.

[btfc]

Save a copy?

[DRR]

Save a copy works and is currently my workaround.

UPDATE: This seems to be a problem on certain files, but not on others. There must be some data in those files that's common, and is somehow tripping up photoshop. Trying to investigate further... but also trying to make deadlines...

[M A V I C]

Repair permissions? Were the files created on the same machine with the same user? Does the drive it's on have permissions enabled?

[btfc]

"Repair permissions? Were the files created on the same machine with the same user? Does the drive it's on have permissions enabled?"

My hunch also.