This appears to actually be a bug. Grace Note is seeing the deleted question title in the badge description, and I am not. See Grace's answer for links and all of that fun stuff.
One of my badges on SO has a 'Reason not available' for its title. I know that it's because that question got deleted.
In the case where a 'reason is not available' it should be fairly simple to find out if the question was deleted (soft deleted) or migrated (question is still there, but answers moved) and show that instead.
jun 29 at 21:42 Reason is no longer available
jun 29 at 21:42 Question deleted or migrated