SWT Designer JFace ApplicationWindow IllegalArgumetException

[hh1nch]

I am running Eclipse 3.0.1 with SWT Designer 3.0.1 build id: 2004.12.31
any time I change anything in the Design tab of my JFace ApplicationWindow I get a pop up that say an error has occured and to check the log.

The log has an IllegalArgumentException:Argument cannot be null

I did not want to post the full stack trace as it is somewhat long but the first mention of SWT Designer is
com.swtdesigner.gef.common.property.DesignerEditorPropertyComposite.handleGUIPropertyChanged(SourceFile:394)

any suggestions would be appreciated

[hh1nch]

never mind. I downloaded the 2005.01.09 build and I no longer get the error

[Eric Clayberg]

never mind. I downloaded the 2005.01.09 build and I no longer get the error

Yes. That problem was already fixed.