I'm having a problem with WMP 11 displaying album art. It was working fine and all the covers showed up in the proper column and then one day nothing showed up and there isn't even a column for them. I've looked at the Use Columns options and the Album Art box is checked but still nothing. Any ideas?

Edit: They show up when I view the Library as Artist, Album, Genre, or Year but not when I view it with the Songs view which is the only one I really use.