[Orgmode] Org files not displaying on Github

[Ross A. Laird]

Some of my org files do not display on github. Here is the error I
received from Github tech support:

,----
| >> require 'org-ruby'
| => true
| >> Orgmode::Parser.new(File.read("/Users/.../laird.org")).to_html
| NoMethodError: undefined method `paragraph_type' for 
| "** Weight":String
| from /.../org-ruby/parser.rb:105:in `initialize'
| from /.../org-ruby/parser.rb:91:in `each'
| from /.../org-ruby/parser.rb:91:in `initialize'
| from (irb):3:in `new'
| from (irb):3
`----

Anybody know what's going on here? 
(Most of my org files display without difficulty on Github.)

Ross

-- 
Ross A. Laird, PhD
www.rosslaird.com