Amazon's stupid CAPTCHA doesn't load in Opera 11 (but lots of things broke in 11, stupid Opera). I had to go to I.E. to change my password, very annoying.
I use a common strong password, but customize it with something related to the site. For instance, my Tom's password might ABcd#!123-TomsHW, while my Yahoo password might be ABcd#123yahoo! The strong-part is easily remembered because I use it everywhere, while the weaker tail means you can't hack Tom's forums and then log into my email account. I remember the TOS from some shady forum site once that said that you gave the site permission to try to log into your email account using the email address you provided and the password you used for their site. Scared me straight, and I've used stronger and different passwords ever since.