I have a fairly simple org file with only a couple of headings, TODOs and some notes. The issue I'm seeing is that Emacs hangs to the point where I have to force close it when I'm trying to expand a headline. The behavior seems random, i.e. it's not always the same header and I don't have specific steps to reproduce. 

Versions:

GNU Emacs 24.3.50.1 (x86_64-apple-darwin, NS apple-appkit-1038.36) of 2012-12-30 on bob.porkrind.org

Org-mode version 7.9.2 (7.9.2-181-ge8aaca-elpaplus @ /Users/stelianiancu/.emacs.d/elpa/org-plus-contrib-20121231/)

Any ideas how can I debug this further or why this might happen?

Thanks!

S.