Will anybody still getting "slow script" errors please tell me the script mentioned in the error message?
Look for some gibberish ending in ".js". I want to improve the site by making some scripts appear only in the exact context they are needed, but I need to know which scripts are causing the problem before investing too much time.
To make life more interesting, the error is probably an intermittent one, because "slow" varies by your set up. Somebody on dial-up might see it a lot. Others might not see it at all. Others might see it with umpty million tabs open after a few hours of work. So, those who get the error, please tell me more exactly what you see, so I can try to make it go away.