I use eclipse. And I have change to 6.4nightly builds and I dragged the TreeTable jar into my webinf/lib folder, but no recompiling of widgetset was done.

From the brower I get

I tried running the sample project from svn , after some jre adjustments, I get

So again the widgeset.

How else can I compile or conifugure the widgeset prooperly?

Do you have the Vaadin Plugin for Eclipse installed? If you have, select the project and click the “Compile Vaadin widgets” button in the toolbar.

Thanks, the darn thing was staring at me all along.