1. install jbdevstudio-product-universal-6.0.0.Alpha2-v20120908-0457-B2720.jar (not the EAP bundle version)

2. start up JBDS (I pointed at an existing workspace - was previously used by jbdevstudio-product-eap-universal-6.0.0.Alpha1-v20120904-0259-H12.jar, so was config'd w/ EAP)

3. error appears:

This might be a very corner case caused by pointing an EAP-bundled JBDS and non-bundled JBDS at the same workspace. But should the condition be handled better?