so cryptopia is still on chain v0.8.5.1-132-g73a4219-beta, did you contact them?
Thank you for noticing, yes I contacted them again today and they are upgrading now.
The old wallet displayed the difficulty as a number which was a multiple of the minimum difficulty. That is why you cannot directly tell what difficulty relates to the old wallet difficulty for the user, as they are displayed differently, but the difficulty algorithms (Kimoto Gravity Well v2 and GroundRod Retarget PID) understand the difficulty very well, as the proof-of-work required difficulty algorithm did not change between KGW v1 and KGW v2. But after block 555555 with the change of the difficulty algorithm to GroundRod PID, the way the proof-of-work required is calculated will change and this is the reason why this is an hardfork.
In truth the PID Difficulty is a number of 256 bits such as 0x00000000010a2d19999999999999999999999999999999999999999999999999, and the PID use this number as it is, but the displayed number by getdifficulty was simplified as shown above.
so will pools have to change something after block 555555? ( will stratum difficulty change etc? )
Normally not, indeed as already stated the difficulty for miners is calculated on the nBits target. So no change has to be made.
A bit more info on the difficulty... You can see the new target by typing "getretargetpid" in the console
15:57:37

getretargetpid
15:57:37

{
"retargetheight" : 546970,
"allowmintime" : 1466256114,
"retargettime" : 1466258267,
"adjustedtime" : 1466258267,
"prevdiff" : "1c0240e1(231)",
"spacingerror" : "+52.7429(210)",
"rateofchange" : "-14.4158(190)",
"integratorheight" : 546969,
"integrationtime" : 172794,
"integratorblocks" : 974,
"proportionterm" : 89.66285966,
"integratorterm" : 167.94450154,
"derivativeterm" : -0.00000000,
"pidoutputtime" : 257.60736120,
"prevdiffx256" : "000000000240e1e32fa7578cbe9d5e32fa7578cbe9d5e32fa7578cbe9d5e32fa",
"hitlimits" : false,
"nextdiffbits" : "1c033add",
"nextdifflog2" : 38.30849247,
"nextdiffx256" : "00000000033add5f3bc530b02247f5f3bc530b02247f5f3bc530b02247f5f3bb",
"tipspacing" : 215.95000000,
"blkspacing" : 87,
"prevshad" : "4d2392a5d6d13d9b5580fabf5f3dc9ea4b246d0400c583f1b1b3e647fd696eaa"
}
The new difficulty target is given by "nextdiffbits" or "nextdiffx256". The pools software will use this number as described in
https://en.bitcoin.it/wiki/DifficultyThe profitability of mining for the casual user when the PID will engage at block 555555, when there will be quite variation in difficulty block to block to maintain the targetspacing to 180, shall best be known on an averaged value. The difficulty value returned by "getdifficulty" is only for next block, and not an average. Two values can thus be used to assess an recent average of difficulty.
First is "prevdiff" or "prevdiffx256" which is the smoothed average of difficulty on the last 21 blocks (tipfilter). Once again the smaller the more difficult. "Prevdiff" is the blue line in the next chart, "Newdiff" is the red line in the chart and the actual difficulty, the limits down (green) and up (purple) of the PID are seen too.
The second way to know indirectly the difficulty on average was stated in a post above, and it is by typing 'getnetworkhashps #'. With # being the number of blocks, 21 (Tipfilter) or 120 (6 hours) are good numbers.
16:27:04

getnetworkhashps 120
16:27:04

2877270143
16:28:37

getnetworkhashps 21
16:28:37

2184023236
With the getnetworkhashps value and your own hashrate it is easy to know how much blocks you shall receive in an interval of time. There are 480 blocks a day in anoncoin, 2.5 ANC per block right now, knowing your hashrate and net hashrate and doing the math you can calculate profitability in ANC per day.
My hashrate = 100 MH/s = 100000000
getnetworkhashps 120 = 2877270143
Proportion of hashrate = 100000000/2877270143 = 0.035
ANC per day = 2.5 * 480 * 0.035 = 42
But to answer your question, both BFGminer and cgminer interpret nBits correctly on 0.9.6.11 with GR RetargetPID enabled, so Stratum shall works similarly.
nodes please?
-addnode=109.133.156.15:49362
-addnode=211.149.175.37:52736
-addnode=84.55.23.199:55863
-addnode=211.149.175.37:51950
-addnode=192.99.13.67:54869
-addnode=108.61.10.90:56562
There are hardcoded DNSseednodes (
https://github.com/Anoncoin/anoncoin/blob/master/src/chainparams.cpp#L124) and hardcoded seednodes (
https://github.com/Anoncoin/anoncoin/blob/master/src/chainparams.cpp#L29) and hardcoded I2P nodes (
https://github.com/Anoncoin/anoncoin/blob/master/src/chainparams.cpp#L36). There is no need to add other nodes.