Default USB Wifi Tethering issue using latest CM

Hey all,

having a bit of trouble holding a USB tethered Wifi connection with my G1. It has the latest CM installed. When I leave it connected for a period of time, the USB connection (not the Wifi) will drop out, leaving me with an inability to access the internet on my PC (still works fine if accessing internet via phone browser).

I am currently at a loss as to what it could be... I have the screen set to not timeout, so it is not the Wifi connection dropping. Any thoughts?