According to the local paper, Phi Gamma Delta has closed its U. of Iowa chapter. Reportedly the chapter had been on probation and concerns following a recent party led to the fraternity's decision. Brothers who had planned to live in the house have been told to make other arrangements, according to the article:
http://www.press-citizen.com/apps/pb.../50816005/1079
If the article is reasonably accurate, it looks like another example of a chapter disregarding previous warnings, probations, etc. -- the "when will they learn" syndrome that has been mentioned a lot on GC.