The patch will prevent this problem from occurring, but does not fix it retroactively. If you do not have a previous recent save before encountering the black map problem, I mentioned a couple work-arounds in my previous post (half a dozen messages up).

You can bypass sealed doors/hatches using;

FIX for the Missing Catacombs Portal
or
Teleporting Anywhere, via hex editor

and get some items back with;
Lost Items - guide and directory of inventory files