i frequently get "you are using a mac, sorry, this site only supports windows 95+" etc. bbc news feeds for example, among many.
plus there is no, decent, proper video libray-all-in-one app, say like real, or WMP. much as they are shite, they offer a function not supported properly on mac (i ignore VLC. it's not finished yet)
there's also games. petty, but irritating also.
and chat support. there's nothing better than basic text-over-IP. other than iChat, which no-one outside of the apple "reality distortion field" uses.
and epson printers. and a lot of hardware is a struggle to get going at first.
my phone (nokia pc suite). i can currently transfer one photo at a time via bluetooth. i have 97+ photo's on ther, that neeed to be transferred off. it takes a minute per photo. i need some mates pc to use it properly.
thats the bad, which is outweighed by the good, but it's still bad. it;'s makes you go hmmmmm...

from time to time