So I've been running Confluence for a while now, currently on windows with version 4.1.3 combined with mysql server 5.0, and I've been getting the following output in the Tomcat console.

(Picture should be of Tomcat, the corporate network blocks the image url, but lets me upload it, go figure!)
I guess my question is, is this normal or is there an issue, as far as I can tell from using Confluenc is running fine as I'd guess it would be screaming a lot louder if there was an issue..