Unless I am missing something huge, I believe that Bard's Song of the Heart doesn't work for Unisaves right now.
Currently, as a level 30 Bard with Song of the Heart, (and 93 perform, so I'm well over the requirements), I only get +2 unisaves when I use my song. +3 with the Classic Chorus.
All the other stats work as expected with Song of the heart, and it adds the +1 AC, AB, Skills and damage to the level 30 song values. So clearly I have level 30 song, it just doesn't get the benfits of +1 Uni saves from Song of the Heart. This applies to every song I've cycled through as well.
Is this a bug? The patchnotes don't seem to have ever removed uni saves from SoTH. Am I missing something obvious? I don't thikn I could possibly have hit the +20 save cap. My saves just aren't that high.