Debugging help, City? art related crash

This is a strange one. I get a crash from a saved game if I press ctrl + z in cheatmode. Also any save game made after getting the map of the Native American civ causes a crash. However not getting the map means you can load saves fine. Also the crash does not occur after getting the map, it happens when loading a save from after getting the map. However if I open up worldbuilder, I can then press ctrl + z to reveal the map after the fact, and do not get a crash (but loading saves after trading the map does still crash). When the crash occurs this is the only relevant thing in the autolog dump. (Python error log, and python log were clean):



Hence, I'm nearly certain this bug is an art related bug that has to do with the city structures (not buildable buildings, just the art for cities themselves, like the houses and what not) for the native americans. Unfortunately I can't find any relevant XML file. This is a merge from the Wolfshanze mod, with Revolution DCM. Other version releases have gone off fine, this is the first where this occurs. So I'm wondering where is the relevant code related to city art. I can't find it anywhere in the XML. I'm thinking that the new python introduced from the latest RevDCM version has messed up a previous python merge I had. At least that's the only thing I can think of.

For anyone knowledgeable about city art, and how and where it's coded, please point me in the right direction.

Using VS2005's search all files ability (so friggin cool) I was able to find it's reference in the pPlotSystem.xml file. However it is exactly the same as Wolfshanze, and has not been altered. Couldn't find any references in the python.... I'm at a loss as to what's causing this...