With relation to the browser locking up, I have only experienced this while a page is still loading, forum sites like XDA take a while to load, ad you tend to start browsing the page before load has completed.
the only other time I have seem this occur is when there are loads of large imaged on the page.
I honestly don't think this is a ROM problem but an ICS / device problem.
I experienced the same on my HP Touchpad, I thought it was an issue with the rom that I was using. It happens less for me on the prime.
Steve
It happens to me as well, only on this ROM, and mostly when the page has flash content. For instance I stream hockey games online and they are streamed wih Flash.
If I watch them on this ROM and I rotate the screen or if the screen goes from full to normal size, the browswer then stops responding.
You cannot get to any websites, whatever URL you try , the browser just hangs. Does it with stock, opera, firefox, all the time. If I restore to a prior stockish ROM it does not happen. The only way to fix it is either boot or go into Apps and clear cache and defaults.
Just an fyi, not knocking this ROM in anyway, I love it I thinks its awesome and I appreciate the hard work.