[O] M-S-(down-arrow) worked briefly this morning and now does not

[Susan Cragin]

Hi. 
I updated my emacs git, got the new org-mode, and tried M-S-UpArrow. 
And it worked. I was elated. 
And then I closed the program and re-opened it, and now it no longer works. 
The message is:
This command is active in special context like tables, headlines or items
--Susan