I'm having a problem in with digital glitching going on when I insert plugins. One big example is when I insert NI's Guitar Rig into an audio instrument channel running a soft synth. If I route the output of the audio instrument track to a bus and insert the Guitar Rig there, it works pretty much fine. I've also been getting a little bit of the same glitching while playing Moog Modular V. This is on a Dual 2Gig G5 with 3.5 Gig RAM, OS 10.3.3, LP 6.3.3. I'm using an RME Digi96/8 card. What typically causes this type of glitching, and is there any way to work around it? (Audio Hardware settings, etc?)