Nope, I'm not saying 6 ft is necessarily an issue, but I have to wonder just WHY you can't get MEtv on the MicroHD as a lot of us are watching it. What firmware is your MicroHd running? Let's try to narrow this down instead of just saying there's a global problem with the MicroHD.
I had a 6 ft dish, and could NOT keep MEtv up and running (with my MicroHD, but it DID scan in fine and work the first time) I swapped to the 10 footer, and now no problem with it 100% of the time. The issue back then (last September) was finally figured out to be that there is/was (not sure if still a problem for 6 footers) a strong sports transponder on an adjacent sat that fires up periodically, and overwhelms MEtv. The 6ft dish scans so wide a field, that the sports transponder wiped out MEtv.
Please don't think I'm just being blindly "protective" of the MicroHD, because I am not. It is at present my primary receiver, but it does have a few quirks that annoy me to no end. That being said, it does an excellent job 97% of the time with what I need done. It's still a work in progress. I am a technician, and like to figure out issues and fix them. The more info we have, the easier that is to accomplish..