Here it is:
They have added a new designed pressure panel in the overhead panel that can be added via aircraft options in the FMC (in the 737-600) but these two misaligned screws on the left pilot foot rest under the rudder pedals are still not patched and still clipping half-way through the cockpit side wall. 
Looks like I have to visit the PMDG forum to help PMDG to create the PERFECT 737 - as soon as this visual bug is fixed I am willing to praise the 737 the same way as the Fenix.
The sound is cool and so different from the 737-700, are there different engines installed? Not the CFM56 anymore?