Do you have any idea why this might be occuring?
I am unaware of any common situations in which user data ends up being corrupted. Are you referring to data on a tag? It could be that when you are writing to user memory blocks, the tag is not in the read field for a sufficient span of time, causing data to not be completely written to the block before the tag leaves the read zone. If there is a specific issue you are experiencing, feel free to let me know and I will try to figure out what is causing the problem.
I hope this answers your question, and I look forward to seeing you at RFID Journal LIVE! in May.
—Mark Roberti, Founder and Editor, RFID Journal
What Cables Are Needed in an RFID Installation? »