'ACID Centos6 on a 1.8G, 4G ram, 120G ssd, 64 bit computer test results.' 
Configured as a simplex node with a URI,  connected to a second node, receivable with a service monitor,  
while injecting a 1khz tone at 3khz into node #1 receiver, the waveform on node #2 transmitter has a ripple.
Reverse this test and the waveform on node #1 transmitter is clean.  Using the exact hardware, conducting the
same test with ACID centos5, and Xipar centos6, the waveform is remains clean.  I am not experienced at this,
but I took a long shot and recompiled the software with different channel drivers.  The results were the same.
I haven't seen much chatter about ACID Centos6, so I thought commenting on the findings may spark some interest.
Comments or Criticisms accepted gracefully
JK