LaTeX in 10941
http://trac.gajim.org/changeset/10941
well, this "weird image" wasn't very beautiful, but at least it was capable to carry some information. It makes a difference weather latex has just failed to process a formula, or it hasn't been even launched (or it was turned off).
Such "weird image" used to appear if you had written incorrect latex syntax and latex itself worked ok. Now you can't easily decide what went wrong -- a mistype or latex just didn't work.
Its better to inform user, weather he has got incorrect latex syntax. May be, just to draw a special small icon?