after quite a hard time I actually get powerline work in urxvt. There is only one problem left:
http://i57.tinypic.com/nnk4g9.png
Does sombody know how I switch the bg-color of the command-number? It's impossible for me to set the color correctly...
Thank you in advance!
I solved it:
There is a option to set colors for each element in powerline oh-my-zsh-theme:
POWERLEVEL_HISTORY_BACKGROUND = "black"