Zsh tab completion duplicating command name

Question

I\'m on OS X Mountain Lion, running the included ZSH shell (4.3.11) with Oh-My-ZSH installed over the top.

When using tab completion with commands such as homebrew, when

Answer 1

This effect also could be reproduced if you use any of fancy UTF-8 characters like arrow, "git branch" character and so on.

Just remove this chars from prompt and duplication will not occur.

Also adding

export LC_ALL=en_US.UTF-8
export LANG=en_US.UTF-8

to ~/.profile can help