When the download stops a window tells me some images (tiles) failed and do I want to use the map as is or go to the properties page of the Birdseye Imagery and download the failed images later.
I have chosen both ways on different downloads and neither one has the option to download the failed images.
I also usually don't have a pause button on the properties page when downloading (I say usually because I did see it on one download recently but that is only one time I have had it)
I am on Windows 8 (not recommended) and I don't know if that is the problem.