Never cleared cookies. With the CAPTCHA issue popping up now and then, solving that CAPTCHA can be a PITA. I have no issues with other places, and the forums here always keep me logged in. Just a main site bug I suppose.
Captchas usually have to correctly guess two straight screen to clear for me. The one that ask for buses, cars, roads NEVER work. it just reload and reload after selecting the first image.
I like the older Captchas where you need to enter a word and phrase.