I think that might be just the way it is. If you click on it again, (two clicks total) then it blows way up and the resolution is back and it looks nice. One click always results in crummy resolution. I'll have to click on other people's maps to see if the same thing is happening to theirs.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe