Regression: Error in component properties box of Carousel in Spanish homepage

In the Template Composer, when opening the component properties of the banner carousel in the Spanish channel homepage, the following error is shown (see also screenshot):
Error during read Server returned statusText: No Content, statusCode: 204 for request.url=/site/_rp/bd5b8e36-263e-4cdc-8cb7-23ef51f519cd./hippo-default/en?FORCE_CLIENT_HOST=true

The following is logged:
[INFO] [talledLocalContainer] 12.11.2012 09:49:36 WARN [org.hippoecm.hst.pagecomposer.jaxrs.services.ContainerItemComponentResource.getParameters():180] Failed to retrieve parameters . java.lang.ClassNotFoundException: com.onehippo.gogreen.components.common.BannerCarousel