The transition of the public repository to the new machine seems to have caused some files with long file names to have truncated names.

If you go to http://rcp.ncsa.uiuc.edu:8080/webdav/maeviz-repo/properties/ncsa.maeviz.socialscience.schemas.tempHousingBldgTypesTable.v1.0/Updated_Temp_Housing_Building_Types_Table_-_Shelby_County1221497243013.mvz and look at the file name, it is supposed to be "<filename>Updated Temp Housing Building Types Table - Shelby County.csv</filename>" but on the server, it is UPDATE~1.CSV.

This causes the dataset to be null when trying to load it. Other datasets might have the same issue if they had long file names.