PS CS4 Applic. Frame has artifacts on Mac

Question

When I open an image in Photoshop CS4 in Window < Application Frame, using a Mac with 10.5.6 & 10.5.7, there are weird artifacts that show up in the background area. If I zoom in and back out, they will go away. But how do I get rid of them all together? Is it a bug in Photoshop? There was a rumor that upgrading from 10.5.6 to 10.5.7 would fix it, but that didn't work. I have an iMac 2009 with 4GB RAM, and the NVIDIA GeForce GT 130 graphics card. This is the only problem I've had. Anyone else had this problem or know how to fix it? I've searched for any similar problems and can't find much. If you know of any other sources that can help, please share. Thanks - bindigok
Will try to post screen shots of it. As opened:
After zooming in and back out:

Answer 1

bindigok wrote:
Did you have Application Frame checked before you opened an image?
Crap, guess I will swing by the Apple store on the way home today and try it on their iMac demo which has Photoshop installed and see if that computer does it.  If not, it's homeward to hours on the phone with Apple!!
Yes, I do have the AF checked.  The only thing I wasn't sure of was how you are opening the file so I tried drag'n'drop, open recent, and using Open and navigating to a file. I tried it with .dng (which opened into CR first and I immediately pressed open), .jpg, and .tiff both layered and not layered.  I also tried with and without my preferences checked to open documents in a tab. No problems encountered during any of the testing.
I didn't try testing with your file because it is queued and not available yet.
BTW, I've heard in the LR forum that when posting with an attachment if one immediately edits the post, deletes the attachment and re-attaches it the queue will be bypassed.  I've not tried that myself.