Project-Specific Self-Closing Tags in TextMate
If you want to switch to using self-closing tags like <img /> and <br /> in certain projects, change the shell variable TM_XHTML for that project to ” /“.
Click here:

Enter this:

The default behavior for TextMate is to use HTML 4, so you don’t have to do anything extra for those projects.
Comments
Nothing to see here yet. Start things off, why don't you?
What do you think about that?