+1 on the crash bug. Fresh install of Openxcom, grabbed latest nightly (openxcom_git_master_2014_11_17_1232), unzipped. Openxcom works fine. Activated FinalModPack.rul, Openxcom restarted as it does when activating mods, and BOOM! crash to console window showing the same thing endersblade saw.
In same boat as endersblade, Final Mod Pack is the only mod installed, and the only one I'm trying to activate.
Windows 7 32-bit.