No problem
We had sudden problems with IE6 slowing down on our intranet, patching it with Service Patch 1 seemed to fix it, maybe it'll fix you
If I had a choice, i'd run Firefox tho
I do for surfing, but our development is all IE based here at wurk.
With the recent brash run of virii your helping yourself doing those critical updates anyways so it's worth the time and effort even if you don't stick with IE as there are some nasty holes in the OS being punched through w/virus this past two weeks.