Signatures get added instead of replaced when changing personalities

[Master One]

I just upgraded from 0.3.1 to 0.4beta, and now whenever I compose a new e-mail or reply to one, every time I change the personality, its signature gets added below, instead of replacing the one from the former personality.

A bug, or a feature?

A patch for 0.4beta to fix that issue would be nice, because I only follow releases, not SVN.

EDIT: Problem got fixed in SVN r3611.