I'm finding my Emacs crashing a lot; other times I get errors like these which I assume are related to the crashes:

I mean total Emacs crashes, where I have to force quit Emacs itself. It's happened in various org-mode situations including:

- pasting text from OSX clipboard

- promoting/demoting org-headings

- moving subtree up or down (i.e. using org-metadown org org-metaup)

My details:

Mac OSX Yosemite 10.10.5

GNU Emacs 24.5.1 (x86_64-apple-darwin14.5.0, Carbon Version 157 AppKit 1348.17)

Org-mode version 8.3.1 (8.3.1-129-ga7c8d2-elpaplus @ org-plus-contrib-20150921/) 

I've tried reinstalling org-plus-contrib... I have also enabled org-element-debug.

Any suggestions on how I can track this down and fix it?

Thanks!