Bukkit

• If all players in a world (in survival / adventure mode) are sleeping, the time will be set to morning like normal.

*plugin.yml now has correct version number

• If you make day/night last longer, there will be VERY small inaccuracies in the internal tick delay. For example if I set day to last 3 hours, the multiplier will be 0.055555555555555555555. Internally the tick delay would be calculated to 18.000000000000000000000000000002 but will be rounded to 18. Again, a VERY small inaccuracy.
  As of 1.2.2, day will have 1 extra tick over night, but that is still very small.

There is not really anything that can be done for this bug