We are currently deploying to Tomcat, and we don't seem to be having a problem. But then, we haven't rolled out to any of our larger clients yet, so time will tell...
I'm not too concerned, because the problem seems mainly to be with Jasper, Tomcat's JSP component. Since we are using Tomcat mainly as a servlet container, this won't effect us. Besides, Tomcat 4.21 is out, with a totally new version of Jasper, so the problem may have been solved.
We are also using Tomcat to serve static content, and I think that we might need to look at this - an Apache/Tomcat combination might perform better here, and give us more fine grained control over caching.
See also Using Tomcat in Production.Posted to Java by Simon Brunning at September 12, 2002 01:58 PM