Here's a little write-up on my efforts last night with CM1 serial 62-0023.

Fired it up for the first time (been sitting gathering dust waiting for some worthwhile bitstreams etc), used my gaming pc (windows) to update controller to 1.3

Connected to the mining PC (gentoo), compiled xc3sprog with some help from arne and others in the IRC channel, and programmed makomk's 190 bitstream.

Configured MPBM, and mucked around with baud rates and dip settings till it was all working, again with more help from ebereon and others (thanks) on IRC. Note with controller 1.3, SW6 #1 dip controls 50/100mhz clock, which also sets 115200/57600 baud. This needs to be reset in the miner worker if changed. At one point the dip switch looked like it was off but hadnt properly "clicked" into the position somehow. It took me a while to realise, a click on and off (and powercycle board) fixed it. You can see the red flashing light next to the controller flashes at half the speed in 50mhz mode quite clearly.

Results for 190mhz: 100% invalids.

Reprogrammed with 150 makomk bitstream:
Results for 75mhz (hadnt quite figured out the dip setting problem above at this stage) : 30% invalids

Reprogrammed with 140 makomk bitstream:
Results for 140mhz: 80% invalids
Results for 70mhz: ~25% invalids

Thats how it stands currently, at 70mhz I get 280MH/s for the whole board, with 25% of that being invalid.

Well its no wonder Enterpoint had difficulties initially and limited the shipping test bitstream to 50mhz.

I've sent an email to Enterpoint asking about the possible capacitor fix that applies to the first 50 boards, or complete RMA.