Per Bastien's request (well, org-mode on G+), I'm reproducing my question here.
After watching a bug reproduction video which mentioned using org-goto, C-u C-c C-j, I wondered what C-u did.[1] I couldn't find it in the manual. It doesn't move the cursor as you type (isearch off?) and doesn't bring up the various hints in the minibuffer that happens with C-c C-j alone. [1] https://plus.google.com/u/0/102778904320752967064/posts/ekYHxqdpT4a Thanks, John