Saved passwords
There has been rumbling going on recently about browser's saving passwords. Somebody has exclaimed that it's possible to retrieve those passwords and how dangerous this is, as anybody who has access to your computer could view your saved passwords.
This is indeed correct - but - anybody with access to your computer could also just go to the web-sites that you have saved passwords for. Not quiet as convenient as a surreptitious look at somebody's passwords for later use though.
Some people are arguing that browsers should password protected their, um, passwords. You couldn't have the browser implement transparent encryption, because everyone would have the same key and it could be easily pillaged from another computer. So you need something unique and re-usable to that user - aka, another password.
Well this is silly. I've already got a password to use my computer. Are people seriously suggesting that I need to logon twice? Why would I want to do that? There is one outside case that I can think of, and that is giving your computer to somebody else along with administrative privileges - which may be required if you give your computer to somebody to fix for you. If you think you fall into this group, then use a Mozilla browser, you've been able to set a master passwords since Netscape - if you so wish (it's not, clearly, forced on you).