gwt-servlet.jar wrong after GWT update

Hi,

after installing a new eclipse 3.7 and installing the GWT plugin, my project has a GWT error:
The file war\WEB-INF\lib\gwt-servlet.jar has a different size than GWT SDK library gwt-servlet.jar; perhaps it is a different version?

I had this before, but I do not remember what to do.
What's the general method for updating GWT projects after upgrading the GWT plugin?

Thanks
Magnus

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