Hrm.... the network is somehow fucked or forked or something....
Half the pools I go to are stuck on block 793 and not finding anymore blocks, while other pools I go to are working on block 802 and seem to be finding blocks fine....
all my 3 wallets on 3 machines, 1.2.1 are having problems with a block, however it seems like they are only printing out an exception and then continuing to work. The miners, however , tell me that they are asked to calculate 59770 and then in fast succession up to the latest block. When a new block is found in the net, the wallet catches an exception, and starts sending 59770 to the miners again, going up fast until the next block the net is working on, right now (at 25/01/2015 20:03:37 central european time) 59795
wallet printout :
2015-01-25 19:43:08 INFO: get timestamp for tx with id -4762078490203704075 found
nxt.at.AT_Exception: Calculated md5 and recieved md5 are not matching
at nxt.at.AT_Controller.validateATs(AT_Controller.java:404)
at nxt.BlockchainProcessorImpl.accept(BlockchainProcessorImpl.java:682)
at nxt.BlockchainProcessorImpl.pushBlock(BlockchainProcessorImpl.java:647)
at nxt.BlockchainProcessorImpl.access$400(BlockchainProcessorImpl.java:51)
at nxt.BlockchainProcessorImpl$1.processFork(BlockchainProcessorImpl.java:323)
at nxt.BlockchainProcessorImpl$1.run(BlockchainProcessorImpl.java:191)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
2015-01-25 19:43:09 INFO: tx with id -4762078490203704075 found
2015-01-25 19:43:09 INFO: get timestamp for tx with id -4762078490203704075 found
it seems the problem started somewhere between block 59761 and 59771
all 3 wallets on all 3 different machines give the same error. i would assume something got in via the network, that the software stumbles upon.