Sent a bug report about it but I appear to have a consistent memory leak or some other lag issue around 12:40 on the clock.
-Update- Seems the 32 bit .exe is fine.
I can't get it to lag, it must be a memory issue so I'll see what I can do in the code to help clean and load memory more efficiently. For a temporary fix, closing and reloading the game would probably help.
