As your PS alluded to, I'd suggest we start looking at periodicity as a possible source, simply because it's the easiest.
I will commit a revision tonight to parameterize the periodicity. I think in the parallel halo finder, because we use boxes that we *manually* make periodic, we always want it off.
It would be instructive to be able to track easily the linked-to neighbor for each particle on the first pass, for example.
Agreed. I'll set this up, too. For this part I will likely distribute patches via the pastebin.
What part of this would you like me to do, if any, Matt and Brian?
I think most effective would be if I set up the code parts to get the data out, and then we can all go nuts on it. I'll do that tonight, after I get home. This afternoon I will likely be writing the entire time, so I won't be doing any of this until after dinnertime. (Especially since I am without BSG viewing this week until tomorrow. Boo.) Thanks for the data & script! -Matt