From professional support of a commercial product of a well-respected software vendor:

"I discussed this with our Development Group. They have indicated that they have not seen a problem such as this before, as most clients bounce the web server daily or weekly."

I will not disclose the identity to protect the guilty, but could not help sharing the information that in 2009 there is a need to restart web servers (this relates to some web app on tomcat really) on a daily basis. Go figure.