java.lang.VerifyError: Illegal target of branch or jump

Still evaluating IntelliJ 3.0 we are forced to use Tomcat 4.0 in development if we want to take advantage of IntelliJ's great JSP source-level debugging. (we'd love to switch to Tomcat 4 but it would require us to use soft links on Windows, if it will help us at all).

Anyway, I get the error quoted in the Subject line: "java.lang.VerifyError: Illegal target of branch or jump" and digging the net quickly revealed that it is an inherant problem with Java class sizes and that using Tomcat 4.1 might help a bit with the problem.

Is it possible to switch to Tomcat 4.1 somehow? So far the only reference about Tomcat 4.1 I found is to NOT try to use it with the plugin, but only 4.0.

Thanks.