Also would it not be possible to turn off posts in a cat if it has children, so could be used soley as a sub menu?
This can be achieved by restricting the permissions for all users in that category to just "Find/Access" and "Read"
Category color is missing in
@SuperMike, it seems this is intentional
The colour is greyed out if the topic has been read, to make the unread topics stand out further.
@julian So this is a feature rather than a defect.