Someone hacked my facebook account!

[Nelle]

That might be a virus/bug Rhyb, as opposed to a hacker. Not sure what to do about it though, I haven't had those sort of problems in ages! *touches wood nervously*

[luna moth]

Your password wouldn't be "guessed" so much as a program would go through various combos for them (by them I mean the scum that did this) That's why it's always recommended to use symbols and numbers in your password. A trick I use is to replace "a" with @ and "i" with 1, used in an unlikely word, like stickytape = st1ckyt@pe
Two friends of mine have had their facebook profiles hacked, and they started posting Viagra-type spam advertisements.

Good luck!