firefox-1.0.1.p_2 crashing on javascript

[Dan Finn]

5.2.1-RELEASE
firefox-1.0.1.p_2

firefox built today, after a cvsup.

Whenever I click on a javascript link that would normally open up a
new window I get the following error written to stdout:
firefox-bin in free(): error: chunk is already free

and then firefox locks up and has to be killed.

Is anyone else having this problem?

I was running .8 up until today and I had no problems with that version.