BUG
When adding a basemap to ArcMap 10.1 using the Add Basemap dialog, the map display is not refreshed and the coordinate system of the data frame is changed to WGS 1984 Web Mercator (auxiliary sphere).
WGS 1984 Web Mercator (auxiliary sphere) is the spatial reference of the basemap layers available in the Add Basemap dialog. This bug causes the data frame to change to this spatial reference when adding layers using this dialog.
Article ID: 000011601
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