With the release of ArcGIS 10.1, we have identified some issues that are affecting the GIS user community and have worked to fix these in some patches that were released today.
The ArcGIS 10.1
Parcel Editing General Maintenance Patch is now available on the ArcGIS Resource Center.
The ArcGIS 10.1 (Desktop, Engine)
ArcGIS Administrator Patch is now available on the ArcGIS Resource Center.
Please download these patches and install them at your earliest convenience.