I've got Hudson running at http://xxx/hudson/. The help files on the config page and icon16.png on the project page are trying to load from http://xxx/plugin/gerrit-trigger/* instead of http://xxx/hudson/plugin/gerrit-trigger/*

I suspect this has to do with how the help files and icon are referenced in the jelly script. For example, badge.jelly has the following line:

<img src="${rootUrl}/plugin/gerrit-trigger/images/icon16.png" border="0"/>

I believe this can be fixed by omitting "${rootUrl}", but I can't build the project to test it myself.