Gail,
I think I just found something. Read Jag's post here: http://social.msdn.microsoft.com/forums/en-US/sqldatabaseengine/thread/71d3cd0b-ce4d-4202-8e3b-38b38da90a5b%5B/url%5D. It sort of makes sense to me, but I'm wondering what else could be affected if I take this advice.
EDIT: I can't restart SQL. This is a production box.