Not really a crash or a serous bug and did not cause any problems, but just for Information purposes:
After closing a world I noticed the DynamicEV Thread throws an Execption (using 0.2.427):
http://pastebin.com/NYNLvENu

Close if this is normal/intended or not important.

Greetings
ultrasn0w

Looks like this is likely a problem with the FluidHelper comparator. Will have a look at it.

Fixed