Heh you're worried about password cache and open yourself to activex and 0-day exploits galore? Mmkay. 
I can handle external threats. I'm set up to deal with those. My primary risk is someone walking away with my laptop, so passwords, encryption, and browsers not caching my bank logins are important to me.
I almost got caught with a click-through attack about a year ago when I was really tired, but that's the only time I've been seriously threatened by any of the gazillion msie exploits everyone worries about. The only time my computer has been completely compromised in the last 8 years was the sony rootkit. Every other attack I've had was either defeated trivially or was a problem only because I clicked on something I wouldn't have clicked on if I wasn't exhausted at the time.
The biggest actual threats I've faced were a burglary where the robbers had full access to my house and 3 computers (my desktop, my laptop, and my wife's laptop) for about 4 hours, and a recent incident where someone attempted to hijack a browser session shortly after I arrived in Iraq. They apparently got one of my bank usernames but didn't get the password correct so all they did was lock my account. So again, my biggest threats are people accessing my security information via physical access to my computer or from a badly behaved browser giving away the info by pre-filling in usernames and passwords to random web sites (what chrome seems to be doing). MSIE simply doesn't DO that, and it has several security settings to explicitly prohibit caching of encrypted pages, delete browser cache on exit, etc. Chrome doesn't have any settings at all like that except a setting that doesn't work that has something to do with not saving login info. I've set that to off, but it still pre-fills some logins so I can't trust chrome with anything important.
