Disk Utility Error Message, what's it mean?

After running verify disk image I got a message saying "incorrect number of threads records."

To start with, what are thread records and what is their significance?

Second, what are the next steps I need to take in this situation and what is the potential for damage or data loss?

Please only post if you really have something to contribute, telling me wow that sounds bad and and that it means there are an incorrect number of threads is really not that sweet and just pretty annoying.