looks like the block chain is stuck at a difficulty of 4.575
4449 2014-04-16 08:39:20 1 314159 4.575 1397693391 18.676 47.5372 7.56919%
4448 2014-04-16 08:39:11 1 314159 1.777 1397379232 18.6801 47.5371 7.56923%
4447 2014-04-16 08:37:09 1 314159 0.441 1397065073 18.6829 47.5357 7.56975%
4446 2014-04-16 08:36:09 1 314159 0.71 1396750914 18.6864 47.535 7.57001%