Read is adding four bytes at 01B8

Been using version 1.0 for a year. When I switched computers a few months ago from Win7 to Win10 Home, I started getting verify errors after writing a file to a 128MB PC Card (various name brands) through a Digigear USB reader. I thought it was an OS glitch or something. The reader gets assigned three different drive letters. Today I read back the image into a new file and compared it to the original. I'm finding four consecutive bytes changed in the read back file starting at 01B8. They were originally 00's. This particular file has FB E9 42 7D. I checked some others and they all had changed values from 00's at this spot. Another file had 86 BD 03 71. Other files had different characters.