vim - nerdtree suddenly broke

Question

Nerdtree has suddenly started acting a little strange. As you can see in the s

Answer 1

As someone suggested in the comments, it was indeed an encoding issue. I had recently switched to zsh.

Adding the following to your bashrc / zshrc etc.. should fix the problem

export LC_ALL=en_US.utf-8 
export LANG="$LC_ALL" 

Alternatively you can tell NERDTree not to use the fancy arrow characters, by adding

let g:NERDTreeDirArrows=0

to your vimrc which will allow you to keep your current encoding