I haven't noticed drop outs (though people tell me I tend to not hear stuff like that; maybe my brain "fills in" the missing part, I don't know) but oddly the old Mosaic vinyl edition sounds better to me than the BN CD edition. But heck, I got it for conveniance.
As I recall, the first, vinyl, editions of Nichols, Monk, and Tina Brooks were the very first things I ordered from Mosaic way back when.