Had a co-gm set their display name to "..." (without quotes), and drag and drop monsters from the compendium started creating blank pc sheets. All the "biography" tab information was intact, but the character sheet was set to pc and completely blank. I joined to test, and we determined after changing his display name that it seemed to be the source of the issue. Obviously the joke of "don't set your name to ..." applies, but perhaps there should be a filter to not allow names that will cause issues?