I have a Sony Memory Stick that I am attempting to copy pictures/video from to my hard disk. It is connected to my computer via a Lexar 6-in-1 flash card reader. After plugging the card into the reader, the partition appears under /dev/scsi/... and I can mount the card without a problem. I can copy all the .JPG files from the card without a problem. However, when I attempt to copy an .MPG file, I get the following error:
The .MPG files range in size from 15M to 30M. Approximately 2M of the file gets copied before the error occurs. Each .JPG file is 1.5M to 2.5M in size.

I tried connecting the card to my computer via the camera itself, a Sony DSC-V1, and the camera's USB cable. It worked identical to the card reader, mounted OK, copied .JPG files OK, errored out on .MPG files.

I'm running Gentoo with a 2.6 kernel. My Compact Flash card works fine in the Lexar card reader.

Any ideas?

How much free space do you have on your hard disk? (Obvious questions first!)
Have you tried using a different method of copying, with dd for instance?

I have 101G free on the partition I'm copying to. "dd" produces the exact same results. It's different every time, but the last time I tried it 2.6M copied before the error. Sometimes it's more, sometimes it's less.

Try using dd with the following (or similar) format:

dd if=inFile of=outFile conv=noerror

With the "noerror" option it will refuse to take no for an answer. If it gets an error, it will simply ask for the block over again.