IDE throws exception after succesfull instalation of Tomcat and Web Applications plugins.

Steps to reproduce:
 - download Java SE trunk build
 - go to plugin manager
 - install Tomcat and Web Applications plugins

First exception ...

java.lang.IllegalStateException: Can immediately enable modules [StandardModule:org.netbeans.modules.server jarFile:
/home/jirka/java/netbeans/ide9/modules/org-netbeans-modules-server.jar, StandardModule:org.netbeans.modules.j2eeapis
jarFile: /home/jirka/java/netbeans/enterprise5/modules/org-netbeans-modules-j2eeapis.jar,
StandardModule:org.netbeans.modules.j2ee.dd jarFile:
/home/jirka/java/netbeans/enterprise5/modules/org-netbeans-modules-j2ee-dd.jar,
StandardModule:org.netbeans.api.web.webmodule jarFile:
/home/jirka/java/netbeans/enterprise5/modules/org-netbeans-api-web-webmodule.jar,
StandardModule:org.netbeans.modules.j2ee.api.ejbmodule jarFile:
/home/jirka/java/netbeans/enterprise5/modules/org-netbeans-modules-j2ee-api-ejbmodule.jar,
StandardModule:org.netbeans.modules.j2eeserver jarFile:
/home/jirka/java/netbeans/enterprise5/modules/org-netbeans-modules-j2eeserver.jar,
StandardModule:org.netbeans.modules.profiler.j2ee jarFile:
/home/jirka/java/netbeans/profiler3/modules/org-netbeans-modules-profiler-j2ee.jar], but not including
StandardModule:org.netbeans.modules.scala.debugger.projects jarFile:
/home/jirka/.netbeans/devtrunkubusunjdk/modules/org-netbeans-modules-scala-debugger-projects.jar; its problems: [module
org.netbeans.modules.scala.editing > 1.0.4]
	at org.netbeans.ModuleManager.create(ModuleManager.java:518)
	at org.netbeans.core.startup.ModuleList$Listener.stepCreate(ModuleList.java:1627)
	at org.netbeans.core.startup.ModuleList$Listener.access$2100(ModuleList.java:1304)
....


Second exception ...

org.netbeans.DuplicateException:
/home/jirka/.netbeans/devtrunkubusunjdk/modules/org-netbeans-modules-scala-debugger-projects.jar is a duplicate of
/home/jirka/.netbeans/devtrunkubusunjdk/modules/org-netbeans-modules-scala-debugger-projects.jar
	at org.netbeans.ModuleManager.subCreate(ModuleManager.java:637)
	at org.netbeans.ModuleManager.create(ModuleManager.java:513)
	at org.netbeans.core.startup.ModuleList$Listener.stepCreate(ModuleList.java:1627)
Caused: java.io.IOException
	at org.netbeans.core.startup.ModuleList$Listener.stepCreate(ModuleList.java:1631)
	at org.netbeans.core.startup.ModuleList$Listener.access$2100(ModuleList.java:1304)
	at org.netbeans.core.startup.ModuleList$Listener$1.run(ModuleList.java:1533)
....



Ubuntu 8.04 Alpha6, Sun JDK from Ubuntu repo, netbeans-trunk-nightly-200803200007-javase.zip

 Product Version         = NetBeans IDE Dev (Build 200803200007)
 Operating System        = Linux version 2.6.24-12-generic running on i386
 Java; VM; Vendor        = 1.6.0_04; Java HotSpot(TM) Client VM 10.0-b19; Sun Microsystems Inc.
 Runtime                 = Java(TM) SE Runtime Environment 1.6.0_04-b12
 Java Home               = /usr/lib/jvm/java-6-sun-1.6.0.04/jre