Comment 45 for bug 81858

> if you open a new report on that, please let us know :)

No need, as it seems there already is one:

https://bugzilla.mozilla.org/show_bug.cgi?id=346382

...which refers to this:

http://www.suseforums.net/index.php?s=8497382120bc18e7f628ad55b18babcf&showtopic=29910

wherein the commenter already tried the precise diagnostic procedure I did.

That's what I get for skimping on my research, apologies for the duplication.
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C.