Dear all, Thank you for the suggestions and help. I reinstalled a vanilla copy of 2010 again, lhen --using the excellent suggestion of \listfiles--saw which packages were being called up, explicitly or as dependencies. I then began to update packages one at a time.
I was able to determine the culprit: EXPL3.STY. It is not something that I call up in my preamble explicitly, but seems to be called up by some other package. Upon copying 2009's directory for this package over to the 2010 distribution's directory, everything works fine again. This EXPL3.sty seems to be having a hard time with calling up or dealing with manyfoot. I will try to find out who the developer is and send him/her the relevant info. Many thanks for all of your help. Kind regards, Talal -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex
