I recently noticed that ezDrummer midi patterns sometimes have certain beats that don't play unless you move them over a few ticks. They play fine in ezDrummer itself but when I drag them over into a Sonar track, some of the instruments beats are silent.  Can it be a Midi resolution issue? I never experienced his with Sonar 3 before?

The default MIDI buffer has been reduced now. You may need to raise it from 250 to 500 and maybe even 750 or more.
 
Try that first.

It's under preferences > MIDI > playback and recording

Yup, I'm not sure the reason behind that change, which was back in X1 IIRC, but there are probably more questions on that than most other subjects.

Increasing it to 750 did the trick! Thanks everyone!