Unfortunately, the stock browser is a little screwed up in RUU 4.03.605.2.. there's some screen redraw/refresh problems where the content won't display correctly until you scroll, and the keyboard has problems appearing on text fields when it should. I even posted about it on another thread:
http://forums.androidcentral.com/verizon-htc-rezound/203056-global-ruu.html#post2099664, but it looks like not everyone is seeing the issue. (Edit: @cdmjlt369 - you helped me out in that thread; thank you again for trying to reproduce the problem.)
To hear that there's some additional issues with forms and auto fill doesn't surprise me. It's so bad for some people that even devs for custom ROMs (such as Vigor360) actually mention using an older version of the browser to compensate for the trouble. (see attached screenshot for the change log.)
Aside from the browser, I can find nothing else wrong with this RUU. That's disappointing, because I have the feeling this RUU won't make it to OTA with a problem like this being so prevalent.
For now, I use ICS Browser+ as my default to work around the screen draw issues. But it's not a complete fix because it still uses the core render engine of the stock browser. JavaScript is still broken (though not as bad) and the keyboard still fails to appear. It's decent enough since I like to have Flash, and if I need the keyboard, I just use Chrome as a backup for now. Will be nice to have this issue resolved when HTC gets it right.