It started again and again:
[2014-01-07 21:41:26.935] "blacklistingPeriod" = "300000"
[2014-01-07 21:41:26.935] "communicationLoggingMask" = "0"
[2014-01-07 21:41:26.935] Loading transactions...
[2014-01-07 21:41:29.509] ...Done
[2014-01-07 21:41:29.509] Loading blocks...
[2014-01-07 21:41:31.763] ...Done
[2014-01-07 21:41:31.764] Scanning blockchain...
[2014-01-07 21:41:33.254] ...Done
2014-01-07 21:41:33.293:INFO:oejsh.ContextHandler:main: Started o.e.j.w.WebAppCo
ntext@58342475{/,file:/D:/nxt/webapps/root/,AVAILABLE}{D:\nxt\webapps\root}
2014-01-07 21:41:33.314:INFO:oejs.ServerConnector:main: Started ServerConnector@
6fc4f728{HTTP/1.1}{0.0.0.0:7874}
2014-01-07 21:41:33.515:INFO:oejs.ServerConnector:main: Started ServerConnector@
59234f41{SSL-http/1.1}{0.0.0.0:7875}
[2014-01-08 01:39:11.184] Generated an incorrect block. Waiting for the next one
...
[2014-01-08 01:39:34.645] Re-scanning blockchain...
[2014-01-08 01:42:36.696] Re-scanning blockchain...
I'll surrender up with NXT.