I have a user that is getting this error:
There is a problem with the label information you are trying to use. You may be able to correct the problem by repairing office or by reinstalling the label information.
When doing this in Word 2010:
Mailing Tab, then clicking on Labels.
Google only brought up 2 results, both for Word 2007 which I tried to no avail.
1. Rename the PAGESIZE folder, repair Office, reboot
2. Deleting a file called pgcustom.xml in Appdata (no such file on the system at all)
At a loss, not sure what else to try?