Thanks its not hard to do a proper bug report but a majority seems not be able to do...
I redownloaded 3.8b but my macerator still explodes with a never ending explosion. I use forge 188.8.131.52.
Edit: 1. Place the macerator on block away from the mfe and put a transformer upgrade into it
2. connect the cable -> it works.
3. Brake the macerator and the cable
4. Place the macerator again, one block away from the mfe output -> it explodes with a never ending explosion (without any cable connection or contact to the mfe)