How to turn off error reporting?

Hi, folks!

I really like the error reporting feature very much. But on a live 
website this is a huge security risk.
How can I turn it off?
For example, org.apache.tapestry.ApplicationRuntimeException error is 
displayed often.
I use the lastest, Apache 3 beta 2 version.

Thanks for your help!

Thomas Derflinger



-------------------------------------------------------
This SF.net email is sponsored by: VM Ware
With VMware you can run multiple operating systems on a single machine.
WITHOUT REBOOTING! Mix Linux / Windows / Novell virtual machines
at the same time. Free trial click here:http://www.vmware.com/wl/offer/358/0