It's not our css - well I hope not as we don't use these fonts - but we are seeing some very odd fonts coming up on some of our 200x200 ads :

e.g.

Laser eye treatment - larger and serif (making easier to see for people with eye problems?)

Acupuncture - smaller more rounded fonts (looks more cuddly and friendly (sorry that's not very design/arty-farty description is it :( )

Anyone else seeing this...