I am trying to convert my notebook to html from the file menu (nice feature added in 2.0), but when I do this I get a 500 : Internal Server Error screen with the text:
In my case notebook server complained about a missing module pygments.formatters: "No module named pygments.formatters"
Doing a "pip install pygments" fixed the problem for me.
I am using IPython version 2.1.0.
After installing pandoc from here make sure you've restarted jupyter and the terminal instance it is running from to update the path. (Aka part 4 of user3638179's answer).