I converted a 2007 filler form to a 2010 Web form, but cannot get past this "Unknown" posting error. I double-checked the data sources and even recreated an older people-picker because it had been causing logic check errors (but did not interfere with functionality as a filler form). I finally received the error text from the helpdesk folks but haven't been able to make sense of it. Is anyone out there willing to take a look at the error and point me in the right direction? (I can post the 35 or so lines of error text here or e-mail it as needed.)