Photoshop CS3 doesn't respond when opening a file (jpg or .psd)

Question

I have been using CS3 since it first came out with no trouble at all. I am running OS 10.4.11. Then a couple  days ago, when I would open a file, such as a jpg, the color wheel just  spins and spins. When I check the finder, it says that Photoshop is not  responding, so I Force Quit, restart computer, etc.
After reading the forums, here is what I have done so far, with no luck:
Made sure that I have the most current version of Photoshop CS3.
Relaunched the program - resetting the preferences.
Set the default printer to "PDF."
Moved and renamed the Plug-Ins folder.
I  have also uninstalled the program and then reinstalled it. That fixed  things for a day or so, but now I am back where I started. I have not  made any changes to my computer. I have not downloaded anything new. The  only thing I can figure, is that the first time it happened, I was  opening a jpg of an image off a CD from a photographer. I had already  opened several images from this CD with no problem. I thought that maybe  that particular image was corrupt, but once I reinstalled, I was able  to open that image with no problem.
Thank you in advance for any help you may be able to offer to me!

Answer 1

Also, out of curiosity, I wanted to see if it would open a new file created in Photoshop (since it launches fine and will open a new document). I tried this and got the spinning color wheel, but the file did save with a preview, but when I tried to open that file --- spinning wheel again.
Then, I thought I would see if I could place a jpg in that new file. It did that fine, but when I tried to save the .psd file, I got the spinning color wheel again.
Thanks!