Digital BW, The Print

Just got my 2400, after upgrading from a 2200.  In doing some initial
B&W prints, I noticed differences between those made at "ICM, No
Adjustments" and those made with "Advanced B&W", with the later
rendering prints that appeared brittle, contrasty and a tad out of
gamma.  All Advanced B&W settings were at their defaults.  Normal ICM
prints looked proper.

I'm using Premium Luster, Best Photo, with the proper ICM and
Photoshop settings.

Is there something about Advanced B&W that I should know to get proper
prints?