IE 6 Service Pack 1 doesnt seem to be affected by it

You will likely see less and less patches for anything other than IE6. After all, you don't hear about security patches for Win95 (oh please we all know they are still there, but not even anti-MSers are beating the drum on those) anymore. They are pushing for upgrade, and speaking personally, I'd rather run IE6 on XP than IE3 on Win95.