User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1b4pre) Gecko/20090415 Firefox/3.0.3, Ant.com Toolbar 1.2 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1b4pre) Gecko/20090415 Firefox/3.0.3, Ant.com Toolbar 1.2 Current as of Build 20090415044329. When typing into dialogue box (i.e search engines) browser crashes if you get 2 or more letters into an entry and there is a seemingly reasonable amount of suggestions based on history (not Google suggestions for searching). Reproducible: Always Steps to Reproduce: 1. Open a site (even the Shiretoko Alpha start page, enter a username) 2. Type an entry into a field that you have suggestions/history for 3. It will crash. Actual Results: Crashed the browser. Expected Results: allow me to continue typing It worked fine 2 days ago.

I assume you are using 1.9.1b4pre and not Firefox 3.0.3.

Correct.