They might have been playing around with their main web site, but could also be your internet browser or your cache files. I haven't encountered such things with yahoo, but don't use it, I prefer using Google. Meti
Yeah, they are probably just messing around with it. I have seen some pretty funky things when visiting Yahoo, so it wouldn't surprise me. Anyway, why are you still using Fx1.5? :-P 2.0 is much better... my browser hasn't crashed since switching...
@PoemofQuotes's I'm using FF 2.0 too and IE 6 IE 7 Opera... because I'm a coder and I must test my new sites in all browser.
Probably a loading error of some kind, possibly CSS. I don't think they would just 'test' stuff on their main page, I am sure they have some secure environment for doing this on. If they just tested stuff on their main page, advertisers would be pretty annoyed. Oh almost forgot, work fine for me.