Here's what I did:
cp ~/.vim/colors/ir_black.vim /usr/share/vim/vim72/colors/
Then tried to open some code and :colorscheme ir_black
It changes a few colors but makes most of the text start to blink with the cursor. It happens with almost all the other custom colorschemes as well. Does anyone have any ideas of what might be wrong?
I added t_Co=256
to my .vimrc file and it didn't seem to help.
PS: I'm on a Mac OS X.
Set your TERM to xterm-256color. Follow up on the iterm2 mailing list if that still doesn't work.