Just got my update a short time ago, have you gotten yours.  Looks like Firefox 2.0.0.1.4 was released yesterday afternoon, and if you have automatic updates enabled in Firefox, you should be getting it yourself in 24-48 hours.  This looks to be like a critical security update because only one change mentioned in the release notes.  Wasn’t rolled in together with any other fixes.

Here are the details from Mozilla:

Fixes for security problems in the JavaScript engine described in MFSA 2008-15 (CVE-2008-1237) introduced a stability problem, where some users experienced crashes during JavaScript garbage collection. This is being fixed primarily to address stability concerns. We have no demonstration that this particular crash is exploitable but are issuing this advisory because some crashes of this type have been shown to be exploitable in the past.

To update you can activate your automatic updates, go to help and then “check for updates” or download the most recent version at getfirefox.com.