GWT Designer Internal Error in Design mode (Eclipse Juno)

anybody has solution for problem described here http://code.google.com/p/google-web-toolkit/issues/detail?id=7492 ?

Instead of design form of UI editor I get this message:

 

Internal Error

encountered unexpected internal error.
 

This could be caused by a bug or by a misconfiguration issue, conflict, partial update, etc.

java.lang.Error: fullImage.getBounds()=Rectangle {0, 0, 1, 1} cropBounds=Rectangle {10, 10, 450, 300}


Stack trace:

java.lang.IllegalArgumentException: Argument not valid
    at org.eclipse.swt.SWT.error(SWT.java:4342)
    at org.eclipse.swt.SWT.error(SWT.java:4276)
    at org.eclipse.swt.SWT.error(SWT.java:4247)
    at org.eclipse.swt.graphics.GC.drawImage(GC.java:864)
    at org.eclipse.swt.graphics.GC.drawImage(GC.java:841)
    at org.eclipse.wb.internal.core.utils.ui.UiUtils.getCroppedImage(UiUtils.java:519)
    at com.google.gdt.eclipse.designer.uibinder.model.widgets.UIObjectInfo.fetchImage(UIObjectInfo.java:366)
    at com.google.gdt.eclipse.designer.uibinder.model.widgets.UIObjectInfo.refresh_fetch(UIObjectInfo.java:303)
    at org.eclipse.wb.core.model.ObjectInfo$6$1.run(ObjectInfo.java:496)
    at org.eclipse.wb.internal.core.utils.execution.ExecutionUtils.runDesignTime(ExecutionUtils.java:139)
....

thank you

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