I've just realised that on the live site that I have SSU on I changed a categorys name a while back but since the instructions weren't fresh in my mind I didn't refresh the cache. It doesn't seem to have had any negative effect that I can spot in terms of actually working, in other words all the URLs say what they're supposed to without me resetting the cache. Is the negative effect therefore just a performance of server issue? Or does it have a bad effect on my sites ability to be spidered and indexed?

Cheers