When I run an application with the first beta of JBoss-2.4.4-Tomcat-4 with JDK1.4beta3, everything runs fine, but as soon as I switched to the second beta of JBoss-2.4.4-Tomcat-4, the same application gives me an error when trying to compile JSPs.

org.apache.jasper.JasperException: Unable to compile class for JSPerror: Invalid class file format in c:\jdk1.4\jre\lib\rt.jar(java/lang/Object.class). The major.minor version '48.0' is too recent for this tool to understand.

C:\JBoss-2.4.4T\catalina\work\localhost\dw\agent\login$jsp.java:0: Class java.lang.Object not found in class javax.servlet.GenericServlet.
package org.apache.jsp;

Since it was working with the first beta, I assume there's probably a quick way to make this work. Some configuration parameter? Changing a library somewhere?

Anybody knows about this?