We added a deterministic random generator in the last build so that random random numbers can't cause out of synch in rare cases in multiplayer games anymore. However, in doing so we introduced a new out of synch error. 

What happened is that we left one line of code using the old random generator by a mistake, and since we don't synch the seed between players for the old random generator anymore, it caused out of synch as soon as you had to groups of enemy units attack each other. This is now fixed.

Change log 0.6.5.4

Bug fixes
- Fixed out of synch problem
- Fixed one case that could crash the game in single player