the Scissor Sisters did a cover of Comfortably Numb that is at least 4,000,000 times better than the original.
Not possible! Lies, damm lies and that statement. Not that I've listened to it, this is just a knee jerk reaction because I can't imagine the campy style of Scissor Sisters doing anything but harm to a PinkFloyd song.
see, that's the thing - i don't think a cover can ever harm another song, or slight another band or anything along those lines - if they're good covers they're amazing - if they're bad, meh - ignore them... and the scissor sister cover IS good

hehe - though i'd say it's more of a mix of pink fliyd - comfortably numb and frankie goes to hollywood - relax
and good covers there are many. such as the following
cure - love will tear us apart (joy division)
pear jam - fucking up (neil young)
pixies - i can't forget (leonard cohen)
[" i stumbled out of bed, i get ready for the stuggle,
i smoked a cigarette, and i tightened up my gut,
i said this can't be me, must be my double,
and i can't forget, and i can't forget,
and i can't forget but i don't remember what" - genius hehe]
placebo - running up that hill (kate bush)
shins - we will become silhouettes (postal sevice)
tori amos - 97 bonnie and clide (eminem) - creepy fucking song hehe
smashing pumpkins - transmission (joy division)
smashing pumpkins - never let me down again (depeche mode)
if i think of anymore... hehe