QUESTION: 
How do the new maps of pluto compare with the maps made during the
mutual events?  Are there any discrepencies?

ANSWER: From Marc Buie, Pluto Planet Advocate, May 26, 1996: 
The new maps of Pluto agree with the older mutual event maps quite well.
There are differences, of course, but most of the differences are 
understood.  I don't expect the match to be perfect for a few reasons.  
First, the mutual event maps are based on measurements that took 6 years 
to collect.  If Pluto were changing during that time, we would have a 
hard time seeing the change.  The HST map is based on data taken over a 
10 day span.  We're pretty sure changes don't happen that fast so this 
map won't be bothered by any changes.
 
Also, the mutual event maps only provide detailed information on the side
of Pluto that always faces Charon.  The other side is MUCH more poorly 
known.  When you take these difference into account then the maps agree 
where I'd expect them to agree and they look different where the mutual 
events had no say in the matter.  Perhaps the biggest dicrepancy is in 
the placement of the brightest area on Pluto.  In the mutual event map 
there is a very bright area seen at roughly 180 degrees longitude 
(opposite Charon) and in the south polar region.  In the HST map, this 
bright area is much closer to Pluto's equator.  This difference is caused 
by how the data (and maps) were collected and does NOT indicate that 
Pluto actually changed.