Difference in controls between Mixer and Synth/Master Effects
MS 2.0 commit b6cba74, Windows 8 64-bit
The rotary controls in the Mixer (mouse down to bring setting down, up for up) work opposite to that in the new Synth/Master Effects panel. They should be consistent, and I think the Master Effects panel should work the same as the Mixer.
See http://musescore.org/en/node/21090 for the original report.