Today while working on a custom JSAPI-based map viewer, my basemap suddently stopped appearing and my BasemapGallery stopped functioning. By default, I have the World Topographic Map turned on, but now I'm just getting a blank screen. It seems to have rendered my application unusable.
The layer, World_Topo_Map, cannot be added to the map.
Additionally, I attempted to load the Basemap Gallery Widget sample from the Javascript API samples page, and it appears to be broken as well.
Is this happening to anyone else or am I just really unlucky? Were there any changes made today to ArcGIS Online services that could be causing this problem?