[news.eclipse.tools.jdt] M7 Classloading problems

[malan2000@xxxxxxxxxxxxxxx (Chris Malan)]

Setup: Eclipse 3.1M7 Sun JDK 1.5 Gentoo Linux
On trying to set a server configuration for JBoss IDE the folliwing 
happens:

!MESSAGE An error occured while automatically activating bundle 
org.eclipse.wst.common.migration (196).
!STACK 0
org.osgi.framework.BundleException: The activator 
org.eclipse.wst.common.internal.migration.plugin.MigrationPlugin for 
bundle org.eclipse.wst.common.migration is invalid
Then Stacktrce ...
Caused by: java.lang.NoClassDefFoundError: 
org/eclipse/wst/common/frameworks/internal/operations/WTPOperationDataModel

All classes mentioned are in the plugins directory in their relevant jars. 
They seem not to be loaded to the classpath.

Also, from starting Eclipse on the command line:

Unhandled Exception
Reason:
Unable to execute early startup code for an extension
Invalid preference page path: CSS Files
Invalid preference page path: DTD Files
Invalid preference page path: HTML Files
Invalid preference page path: JavaScript Files
Invalid preference page path: JSP Files
Invalid preference page path: WSDL Files
Invalid preference page path: XML Schema Files

ECLIPSE_HOME, JAVA_HOME etc is set.

Any idea what is going on? Eclipse 3.1M6 seems reasonably happy.

Chris