I have the latest stable build (GeoServer 2.1.0) installed on WebSphere 6.1. I can add a new Workspace fine, but when I try to add a new Store (of any type) I get redirected to the Welcome page. I have had GeoServer 2.0.3 working fine, but I need WMS 1.3 so am using GeoServer 2.1.0.
Also, I occasionally get the following error:
Error 500: SRVE0207E: Uncaught initialization exception thrown by servlet