I'm using Mac OS X Lion, Terminal.app and Tmux version 1.6. I get a dashed line as a window border instead of a continuous line that I get when I ssh into a Debian virtual machine on the same computer using the same terminal. How can I change the dashed line to a continuous line?
I found the origin of the problem. It's the font. I was using Monaco and it displays vertical dashes in a way that the vertical pane separator is dashed. With Menlo however it's solid.