1. Install the latest Firebug release: http://getfirebug.com/releases/firebug/1.6X/ (1.6X.0a11)
2. Install the latest FBTest: http://getfirebug.com/releases/fbtest/1.6/ (1.6b14)
3. Tools->Firebug->Open Test Console
4. Under DOM run the 'dom/2558/issue2558.js' test
I couldn't reproduce this on the 32-bit binary.
As expected, it works for me with Firefox 3.7a5pre, 32 bit
Unfortunately, I don't have any 64bit machine to reproduce this.
Anyway, this test is related to a "next" property hidden in a wrappedJSObject,
see bug #536137.
jst, you might want to mention this for your release notes in the developer preview. We found that linux 64 bit builds will crash during the firebug unit test suite.
Haven't been able to reproduce this in any of the 4.0 betas. WFM