Well, if the user writes anything on PeopleEditor(allowtypein=true) and then from any point of it starts to backspace till the beginning, the PeopleEditor loses focus.
This is a quite annoying problem for people like me who press backspace like crazy until everything is erased. Because the next backspace after the beginning point will just send you the previous page, thanks to back shortcut on backspace.
It is likely due to a SP bug rather than something wrong I have done. Still, I wanted to ask..