Edit: Ignore this actually, I think I figured out what the problem is...

Quote from DarkTimes :

Hey, I'm getting some weird ads on the forum, really not the sort of LFS related stuff I normally see... One even has (semi)nekkid ladies... I for one am shocked and appalled.

Anyway, what's up with this?

Edit: There are loads more showing too, all very trashy.

Run adaware or some other similar spyware app. Probably the cause for that is just some adware thingie.

Surfin' porn is bad for your comp, m'kay

Yeah, I just realised that they're coming from this PC, not the forum. Thankfully it's not my PC, but sadly I do now have to fix it.

Spybot Search & Destroy + AdAware + AVG in Safe Mode should do the trick.

Got the same issue brought about by me downloading all sorts of apps to unlock phones.