I'm using Ario 1.4.4 from Ubuntu 10.04. I did not have this problem with the previous version in Ubuntu 9.10.
The Title box in the Artist-Album-Title view has been replaced by AlbumArtist. So instead of the list of the songs in a given album I now have a single entry "Unknown" ("Sconosciuto" in italian). I indeed never filled the AlbumArtist tag (what is it for?) but I found no way setting to bring the titles back. I attach a picture showing the problem.