Hack for gnome-terminal.

.bashrc

@@ -62,15 +62,17 @@ shopt -s histappend
 #
 if [ "`uname -s`" == "FreeBSD" -o "`uname -s`" == "Darwin" ]; then
     alias ls="/bin/ls -aFG"
-    alias tmux="TERM=xterm-256color /usr/local/bin/tmux"
     alias w="/usr/bin/w -i"
 elif [ "`uname -s`" == "Linux" ]; then
     alias ls="/bin/ls -aF --color=always"
-    alias tmux="TERM=screen-256color /usr/bin/tmux"
 else
     alias ls="/bin/ls -aF"
 fi
 #
+if [ "$COLORTERM" == "gnome-terminal" ]; then
+    export TERM=xterm-256color
+fi
+#
 [[ -s "/etc/bash_completion" ]] && source "/etc/bash_completion"
 [[ -s "/usr/local/share/bash-completion/bash_completion" ]] && source "/usr/local/share/bash-completion/bash_completion"
 [[ -s "/usr/local/share/git-core/contrib/completion/git-completion.bash" ]] && source "/usr/local/share/git-core/contrib/completion/git-completion.bash"

.zshrc

@@ -88,6 +88,10 @@ else
     alias "ls=/bin/ls -aF"
 fi
 #
+if [[ "$COLORTERM" == "gnome-terminal" ]]; then
+    export TERM=xterm-256color
+fi
+#
 export BLOCKSIZE="k"
 export EDITOR="vim"
 export GIT_PAGER="less"