Flash seems to be the biggest problem with the 2.2 HTC pre-release build. I've poked around with the problem for a few minutes and have yet to find a solution to getting 10.1 to work, however, you can get around the random crashes by starting your browser and immediately stopping whatever page is loading. Head into the settings and disable javascript. This will enable you to still use your browser, just not any flash. Hopefully we'll get a solution shortly.