We are talking of 3 line of codes.. Any way I added some debug print lines on a new script
http://jb68.com/pkg/bitrate_dbg
Just download, make it exec then run it on zs and post the results. Here are mine to see what I need:
Load Line=0.11 0.16 0.26 2/527 25021
CPUs=1
Load=16
0.00 bit/s (Connections:35 Load: 16%)
It might be an issue with printf, but for now just post the output.