Just noticed that I am having the same issue with one of the photos that finally came through after being stuck, see [this][1] topic for more information about that.
Here is my example of the same issue as @GOwin : http://www.mapillary.com/map/s/VNfCyeBb5Q8wUCoCZDAPZQ
[1]: Am I uploading into a black hole or is Mapillary swamped?