o and O don't work with Sublime Text 3

[rrerolle]

Those shortcuts do enter insert mode, but they don't add a new line as expected.

See the annoucement of Sublime Text 3, http://www.sublimetext.com/blog/articles/sublime-text-3-beta/ as well as this forum post:

http://www.sublimetext.com/forum/viewtopic.php?f=3&t=10788