There are several variants of the 1A 'update', H1, H2, etc.
Within each update, there are options of 'mods', 38778, 39779, etc
Dependent on installed equipment, other updates, mods, and certifications...
The 1A H2 mod has the issue with fuel predictions on many A320's, so perhaps the issue you have mentioned is another bug, awaiting the new FMS version.....
Last edited by FlightPathOBN; 23rd Nov 2012 at 18:30.