Texrat - I get the sense that you took my advice a little too harshly. It's a quite nice song that is nearly there and there are just a few tweaks needed to really 'take it to the next level'. It's worth doing.

Coming across my monitors, the panning issue really sounds like it is limited to drums only. Now, I did a little test with a pan control while listening - and perhaps it could be an EQ issue - more highs seem to be coming through the left channel than the right channel. Because of your instrumentation choice, it makes the drums sound biased more left than right as the high hats and snare have the most noticeable content in the high end of things. What reverb plugin are you using with what settings?

When you say you see a panning bias in every track in Sonar, how exactly are you seeing the left/right difference? In other words, how is Sonar analyzing the tracks? Are you looking at VU meters for each track in a post process sense or before plugins on each track? Make sure to look strictly at mono sources, like the original vocal tracks in this case - they are very likely mono.

The RealDrums tracks should show equal levels on the kick events for L/R, but don't count on any of the other sounds showing up equally left and right.

-Scott