It started happening to me today. It was working all this week with locations turned on and google as my home page, however this morning I opened the browser and it closed by itself, repeatedly. I realized that it had something to do with location as it closed imediately after "updating location". I set the browser not to use the location and now it works fine.
However, now I get "location unavailable" and a link to update. If I click update, then the browser closes, so it seems to be related to lbs.
What I don;t understand is why it started happening yesterday, after a week of normal operations.
I really hope the GPS and compass are fixed in the next release/OTA update, otherwise, back to my nexus one.