Hi,
i have made a scene with 4 mountains, all those have dynamic populated tress, (since my 4gb ram, dual xeon,8800gtx, xp64 machine freeze to display populated trees[not dynamic])
th problem is, when i render the scene with 4 computers,
for example comp1=frame1-50, comp=51-100,comp=101-150, comp=151-200
in all the frames 50-51, 100-101,150-151 some of the trees change place during animation, just like some trees are popping up randomly
i believe there has to be a cahe sth like particle cache, which is the manual populate button i presume 
however i can not even rotate the view with that.
How do you solve this issue?
In addition, what is the best time efficient (for render) parameter to degrease the flickering in the huge trees?
thank you