Some tiles not available in World_Light_Gray_Reference basmap

[BillDaigle]

Anyone else having trouble accessing some of the tiles in the World_Light_Gray_Reference basemap? When I zoom the map all the way out while this basemap is on, there are a number of tiles that fail to come back (502 Bad Gateway error) and the map is largely unresponsive until the requests fail. 

This is one of the tile that I seem to be having problem getting to. 
http://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Reference/MapServer/ti...

I was able to replicate the problem in ESRI's sample apps, so I don't think the problem is on my end.

[BillDaigle]

I have to wonder if this is related to the update to the Basemap system that occurred last night: http://blogs.esri.com/esri/arcgis/2013/12/17/esri-basemap-system-upgrade-to-arcgis-10-2-for-server/

I read the section about case sensitivity and tried updating the url to what they recommend, but I still get errors with certain tiles.  Anyone else having this problem?