Adding the nodes manually from the debug console worked for me, and since then starting with two identical config files (with and without the accent) seems to sync ok.  No idea which of the two config files is being used.  Anyone know of the equivalent of lsof for windows?

Just wondering if anyone knows why the difficulty quoted on blockexplorer, which incidentally is same as shown in pools stats, is different to what is shown in my solo miner ie at time of writing solo mining on groestl using config.

sgminer --gpu-platform 0 -k myriadcoin-groestl -o  http://localhost:10889 -u user -p password -I 12 -g 2 -w 64 --gpu-engine 1160 --gpu-memclock 1000


sgminer 4.1.0-96-g983e - Started: [2014-04-09 10:17:51]
--------------------------------------------------------------------------------
(5s):6.160M (avg):5.854Mh/s | A:0  R:0  HW:0  WU:0.178/m
ST: 4  SS: 0  NB: 27  LW: 0  GF: 0  RF: 0
Connected to Pool 0 (longpoll) diff 221 as user "£$"£
Block: bac3883a...  Diff:221  Started: [10:32:20]  Best share: 2.459
--------------------------------------------------------------------------------
[P]ool management [G]PU management [ S]ettings [D]isplay options [Q]uit
 GPU 0:  54.0C 1644RPM | 6.134M/5.873Mh/s | R:  0.0% HW:0 WU:0.178/m I:16
--------------------------------------------------------------------------------
[10:29:08] Network diff set to 221
[10:29:08] New block detected on network
[10:30:26] Network diff set to 221
[10:30:26] New block detected on network
[10:30:42] Network diff set to 221
[10:30:42] New block detected on network
[10:31:46] Network diff set to 213
[10:31:46] New block detected on network
[10:31:48] Network diff set to 221
[10:31:48] New block detected on network
[10:32:14] Network diff set to 221
[10:32:14] New block detected on network

As can be seen miner reports diff as 221 but block explorer (http://myriad.theblockexplorer.com/) quotes diff 316.15271549?

I'll give you a try, mined with you on Max, god luck.