MassiveCraft is now updated to Minecraft 1.7.2
Find out what Mojang changed here:

Our resource pack is mostly updated and can be downloaded here:
Optifine is however not updated yet. If you have FPS issues you should try setting graphics to fast and reducing your render distance in your client video options.

Please report bugs here on the forums:

Some features aren’t fully updated yet and will be fixed in a few days:

  • Chairs are disabled.
  • Signs can not be edited through right clicking.
  • Footprints will not appear.
  • Vampires will emit potion effects.

Enjoy the new flowers!