I got this dialog pop up when it was trying to upgrade my solution which had a few web sites in it.
It seemed to get lost. I dont know what the VS dialog with 'Description' is all about.
Not sure what triggers it to say it needed an update and yet there is nothing to update.
Its possible that there is a backup folder that it created from a previous upgrade and it is looking at an old DLL in that project.
Anyway, sure you will sort it out :)