Get an out of memory error sometimes when upgrading to Master Archivist.  I've actually been able to get past it but the memory issue is reproducible.  The game is usually around 800-900 MB in memory but when I research Sages and it upgrades all my Archivist buildings usage jumps to 1.4 GB and gives me an out of memory error unless I'm careful (zoomed out to cloth map, turned down some of the graphic/audio options, saved/reload right after the upgrades complete - on reload the game is back to running around 800 mb).  It may also be due to the fact I'm running on a large map and I have a lot of archivists. 

Running on Windows 7 x64, 8GB RAM.

Pasting the savegame below, to reproduce you just need to end the turn and choose Sages for research.

http://dl.dropbox.com/u/16946585/asdasa.EleSav