FWIW, works for me on Windows: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4
Hmm, I've just tried it with an empty profile and it seems to work OK, although it did pop-up a window the first time (but I can't reproduce it), which I've never seen in my usual profile. Is there any way of narrowing down what extension or config option might be causing this behaviour?
Alright, so it's obvious an extension is causing this. -> INVALID What you need to do is just disable extensions one by one until you find the culprit.
Alright, since this is a crasher I reopened it. Rich, could you please get a stacktrace or a talkback ID from the crash? Thanks. http://kb.mozillazine.org/Talkback
Please use a recent version of Firefox, available at http://www.mozilla.com/en-US/firefox/, and report back with your results in relation to this bug report. If this problem can be reproduced, please reopen this bug report. Due to age/lack of response, closing. (bug cleaning)