TL;DR Use UTF for Seller's name.

Looks like a bit better Gumroad. Design is nice, blah blah blah. Why I'm writing is this: when activating account what the hell is supposed to be Seller's Name?

This annoying popup keeps telling me "Must contain only letters, numbers, or - ( ) , . ' &". I must say I haven't seen many names with numbers or ampersands in it. If it's meant to be a username, than ok but say it specifically. If it's really meant to be a name - it's 2013 for Ozzie's sake, use the damn UTF.