Hm, this problem does sound quite unique. As far as I know, in some situations using different DPI settings (ie. larger fonts over smaller fonts) can create a few problems in our older versions of MediaLab. Sending the software percentage based values can occasionally cause errors in this type of situation.
Thanks for the update. This error shouldn't be a problem in future versions of the software. Please let me know if I can do anything to help, or if you need any more assistance.