Re: The official MacMiner thread [BTC/LTC-CPU/GPU/FPGA/ASIC]
The miners that did not work were an ASICMiner V3 Erupter Cube and a BFL Jalapeño.
I'm using a BFL Jalapeño with this version - we've probably got a backend behaviour here - one thing I would suggest is starting the BTC miners BEFORE starting the gridseed miners on LTC mode 
If that's not it, I wonder whether it's an issue with the proxy for the cube