If you like running Tomcat from within IDEA and you want to be a Tomcat version 6, you need to stick with Tomcat 6.0.10 for a while. Any later version causes this complaint to come up when you launch Tomcat: "Error running Tomcat6: Cannot find configuration of jsp built-in servlet in C:\Users\greg\.IntelliJIdea60\system\tomcat_Unnamed_7dbqbe5b1\web.xml". I noticed just the other day that Tomcat 6.0.14 came out and I confirmed that this version has the problem too.