Just wondering if anyone else can crash WeBuilder using the following method. It may be my particular setup, or it could be something that needs fixing. I have submitted a bug report to the team at Blumentals and it would be interesting to see if it affects anyone else.
Create an html file or use an existing one but put a nonsense link in it, or a link to a local page that doesn't exist. Save the file. Preview full screen with IE preview. Click the link and WB will display the usual page not found error. Click the Navigate left arrow icon on the Tab toolbar (refer to screen shot below). On my machine, boom, instant crash. Out of a dozen tries, I get about 10 crashes, which indicates it doesn't do it every time, but more often than not.

Have fun...
Edit: I have tried this after a fresh install of 2011 on my new computer and it does the same thing, also with the Mozilla control. It is either something peculiar to the way I set up my computers (running either Windows 7 Business or 7 Ultimate) or a bug in the software.
Cheers