Column selection does not work in PDF export in embedded reports

Column selection does not work in PDF export in embedded reports

PDF export from a report is a great feature, but I can't get it to work properly from an embedded report or from a standalone link. If I try to select columns I get an error in any browser and specifically the attached error in IE8.  It will export all columns but that is pretty much useless.  If I am signed in to Zoho it works fine, but I don't want to have to expose my user to all that back-end stuff.