git tab completion shows ansi escape sequences

Tab completion results in this output:

$ git <TAB><TAB> ^[[31m^[[K c^[[m^[[Kount-objects g^[[m^[[Ket-tar-commit-id replace a^[[m^[[Kdd c^[[m^[[Kvsexportcommit g^[[m^[[Krep request-pull a^[[m^[[Km c^[[m^[[Kvsimport g^[[m^[[Kui reset a^[[m^[[Knnotate c^[[m^[[Kvsserver help revert a^[[m^[[Kpply ci imap-send rl a^[[m^[[Krchive co init rm b^[[m^[[Kisect d^[[m^[[Kaemon instaweb send-email b^[[m^[[Klame d^[[m^[[Kescribe log shortlog b^[[m^[[Kranch d^[[m^[[Kiff logk show b^[[m^[[Kundle d^[[m^[[Kiff-files lol show-branch br d^[[m^[[Kiff-index lola st c^[[m^[[Kat-file d^[[m^[[Kiff-tree ls sta c^[[m^[[Kheck-attr d^[[m^[[Kifftool merge stage c^[[m^[[Kheck-ref-format f^[[m^[[Kast-export mergetool stash c^[[m^[[Kheckout f^[[m^[[Kast-import mv status c^[[m^[[Kheckout-index f^[[m^[[Ketch name-rev sts c^[[m^[[Kherry f^[[m^[[Ketch-pack notes submodule c^[[m^[[Kherry-pick f^[[m^[[Kilter-branch pull svn c^[[m^[[Kitool f^[[m^[[Kmt-merge-msg push tag c^[[m^[[Klean f^[[m^[[Kor-each-ref rebase tlog c^[[m^[[Klone f^[[m^[[Kormat-patch reflog unstage c^[[m^[[Kommit f^[[m^[[Ksck relink whatchanged c^[[m^[[Kommit-tree f^[[m^[[Ksck-objects remote c^[[m^[[Konfig g^[[m^[[Kc repack

This is on Linux Mint 11 but it also happens on openSuse 11.4.

$ echo $SHELL bash

$ echo $BASH_VERSION 4.2.8(1)-release

$ echo $TERM xterm-256color

The same result when TERM is set to xterm, rxvt, rxvt-256color, rxvt-unicode.

Does anyone know why I'm getting this output?

Thanks, Mike