[news.eclipse.platform] 3.5M5 [viewContribution] action activation by th

[sergej.alekseev@xxxxxxxx (Sergej Alekseev)]

I'd like to have my own action in the debug view. The action has to be 
activated when an element of the java stack frame is selected.
I defined the following extension  point and created the class 
my.test.DebugAction implements IViewActionDelegate.

<extension
 point="org.eclipse.ui.viewActions">
 <viewContribution
       id="my.test.viewDebugContribution"
       targetID="org.eclipse.debug.ui.DebugView">
    <action
          class="my.test.DebugAction"
          id="my.test.DebugAction"
          label="Test Action"
          toolbarPath="additions">
          enablesFor="+"
       <selection
             class="org.eclipse.jdt.debug.core.IJavaStackFrame">
       </selection>
    </action>
 </viewContribution>
</extension>

This solution works fine for eclipse 3.4 (ganymede) but doesn't work for 
3.5M5 (galileo) any more. The action is visible in the debug view but 
disabled. If I remove the enablesFor="+" parameter then the action is 
always enabled.
What is wrong in my extension point implementation or may be is it an 
eclipse bug?