I've noticed a sudden and major slowdown on our citrix farm today - all due to one site being used by half a dozen girls.

BBC - CBBC - Tracy Beaker - Fun and Games: Tracy Beaker Games to Play

Looking at the memory usage of iexplore when that site is open, it averages at around 450Mb but goes up to 900Mb at one point!

So, to any other Citrix/Terminal Services users out there - you may wish to block that site as a memory hog.