I have a customer complaining that their 4050 started sending the PDF files to the folder corrupted(intermittently). When tries to open a file Adobe returns a message saying file is corrupt. I'm going out tommorrow to reflash frimware.

I would be curious if the high-compression PDF mode is unlocked on this machine and if the customer is using it. Maybe experimentation on the quality settings of the PDF is called for also.

I'd run a check on the hard disk.

Sadly the only other times I've seen this were with the KM-4530's and that required the Main PCB to fix!!!

Thanks for the replys guys. I'm going out this morning to play around with it. I'll let you know what I find.

Mike - just a heads up - if the disk check fixes it, don't be surprised if the problem comes back. Seems like the disk check just buys you some time to get a replacement drive.

Formatted drive no problems yet. Will let you know.