Google gears + IntelliJ

I created a sample GWT project in IntelliJ and added the gwt-google-apis.jar (1.0.0). I am using GWT 1.5.2
Then I added ]]> to the gwt xml file.
When I build I get:
Error: Line 71: Type 'long' may not be returned form a JSNI method.

I am assuming that there is not an issue in gwt-google-apis.jar as it was released in May.

If anyone can help I would greatly appreciate it.

Tom