[dmit]

Does it work ok without tmux? If not, does git print directly to the terminal, or does it pipe to another program (like a pager)? Most programs make an isatty check in this case, but if you force printing of escape codes and pipe the output to less for example, you'll see the codes in the output instead of their effects.

[mise]

Actually, I think you're right, I probably was piping to less at the time (which tmux makes me do more of than usual).