I just got a replacement WP8 Nokia 928 for a defective one. After putting the SIM card in the new phone from the old I went through the start up options and one of them was to restore from my old phone, it showed the name of the old phone ore start with a clean slate. I select restore settings from the old phone and everything seemed to be going well until I got an error message that said it was not able to restore because it lost signal (my paraphrase). Ever since then I have 16 of these messages in my Market place message area, Downloading Application Attention required tap here. Can I get rid of these w/o resetting my phone?
After some frustration and searching I found the answer here.
In short, if you hold the "Downloading application" progress message instead of tapping it, a pop-up dialog appears offering a "Retry" or "Cancel download" option. Tapping "Cancel" successfully cancels the corresponding download.