http://www.writing.com/main/view_item/item_id/1896212-Contest-entry-Protag-Backg...

EDIT:

I hope the format of the link is acceptable? Stupid me forgot the formula to link my entry in the way that only allows access by group members.

I can't think of a single, sane reason why any agent or publisher should have a problem with a protagonist's backstory being public when it isn't part of the novel. But that's just me thinking logically.