Nerd tree: enter does not open sub dirs

Question

I installed NERDTree via Pathogen on Mac OSX 10.6.8.

When I vim a dir, I cannot enter into sub dirs with enter key. Furthermore, the dirs look like this:

?~V? doc/ 

What's going on?

Answer 1

Putting this in my .vimrc solved the problem: let g:NERDTreeDirArrows=0

The creator gave me the fix: https://github.com/scrooloose/nerdtree/issues/108