Sadly, Michael is right. Whilst there was some support at the beginning, it doesn’t seem like anyone from the company has been here in years.
There is this thread from years back that Mr. Chambers was kind enough to comment on. It is for Strontium Dog, but since they basically share a rules set, it may answer some of your Dredd questions as well. There is a post from Chambers linking to a FAQ/Errata for SD about half a page down.
