Posted this as it's own thread, but thought it'd be worth while repeating it here:

Recently upgraded to L8 and am noticing a HUGE (like, 300-500ms) amount of fader lag with my usb connected MCU Pro. L7 works fine. Of course this is in addition to a myriad of other flaky MCU behaviors w L8. I do have a Symphony system running the most current Apogee drivers, but I thought the MCU conflicts had been worked out... Tried deleting all my midi settings, but no luck. Since L7 works well on the same system, seems like the culprit would have to be L8 anyway...

Any idea oh collective consciousness? Anybody else with this problem?

MacPro (8 core) 5GB, OS 10.4.10, MCU Pro/XT/C4, 1 Symphony Card