I’ve only had my iMac for about 9-months and I’ve lost some basic functionality.
When you want to select a continuous group of files one can usually select the first, hold down the shift key, select the last and all files between will be selected as well.
Not on my iMac.
It works here and there, but not everywhere. I haven’t yet noticed any particular patter to its erratic behaviour.
Running Snow Leopard if that helps.