Yes it is a problem. It is preventing me from creating any forums. When the application tries to create a forum and is inserting records into the gforum_forum table,it is often sending '' as the value for fields of type integer with the 'restriction' not null default 2. So, the app tries to insert '' for this, which I can only assume is intended to get the default. I can create groups fine, but not a single forum.
--jaga