Dear IPC-5 competitor,

there are a couple of minor changes concerning the preferences for two 
(already released) domain versions that we would like to make. 
This is to better express the type of preferences we originally intended 
to have in TPP QualitativePreferences, and to reformulate the plan metric 
in Openstacks QualitativePreferences as an (equivalent) minimization 
problem (the original version used maximization -- but we believe that 
for most of the current planners minimization is more convenient).

Also, the Trucks domain that we released yesterday evening contained 
a few minor bugs which we have now fixed. So, we have updated all 
versions of this domain too. 

*** PLEASE USE THESE REVISED VERSIONS, WHICH ARE ALREADY AVAILABLE FROM 
*** THE COMPETITION MACHINE

It appears that no team has run the tests involving preferences yet, or
has attempted the trucks problems yet, so hopefully these changes do not
require any extra work for you!

Sorry for this inconvenience!

Alfonso and the IPC-5 organization committee.