I did a 'crim' Saturday practice today because I really felt like my body was crying out for it. I woke up this morning in a bit of pain, but practice smoothed out the rough edges and I was actually feeling good by the time I got through the series.
I made all the modifications from yesterday, plus skipped the Kurmasanas and didn't do any kind of closing - just Savasana. No backbends at all.
By the end of practice, I could look over the right and left shoulders without pain, and pain was significantly reduced when looking at my belly-button (as I'm sure you can imagine, this shoulder Snafu has greatly limited my tendency toward naval-gazing...ha, ha, ha! Oh, never mind...).
All in all, I feel better today.