Did you know if you recently bought a Xerox copier, there may be some scanning issues? In fact, the problem has gotten so bad that Xerox had to put a scan patch page on their site to address all of the issues people are having with their firmware and drivers. The hardware seems to be OK, but the software and the way they work together does not seem to play nicely.
It is pretty bad at this point. People are buying $10,000 copiers and getting crazy scans that drop letters or characters, even on the lowest resolution setting. If you are having weird scanning problems and recently bought a Xerox, checking out this page could be handy for you.