images & other data getting corrupted

saw

Registered
I have an imac, running 10.4.11. Suddenly I'm having a problem viewing images I've loaded onto the computer. I get the following error - "Couldn't open the file. It may be corrupt or a file format that Preview doesn't recognize." It's very random though. Initially I may be able to view the file (typically a .jpeg), then later I can't, or some of it appears but it's corrupted.

I've tried this using pictures from several different digital cameras/memory cards, so I don't think it's a fault on that end. Also, I've had some problems merely opening up screenshots, and TextEdit files - though again, this seems random.

Thinking there might be cache issues, I cleared the history folder, but that didn't help.
 
Test you hard drive. Sounds like it is either messed up or very defragmented. Boot from the OS X install disk and use Disk Utility to see if the drive is messing up.
 
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