Here is a problem I have with Mute~in max 6.0.1
if I send 1 to Mute~ before the DSP chain is ON, my patches aren't muted.
In max 5 and Max 6.0.0 the Mute~ state was taken in account even if the DSP chain was OFF.
Here is attached a patch who show it.
Note that this patch with Max 5 take 6 CPU's percents on my mac and 9-11 with 6.0.1. Also note that some patches have worse performances on MSP 6.0.1 than it was on 6.0.0 !!