In this comment (which, may be deleted eventually) Jayarava wrote,
Nope. It appears I cannot delete my own comments.
No I don't see the icon. I'm using Chrome on Vista. That a problem?
Assuming you're using the non-mobile version of the site and using a mouse, then when you use the mouse to hover over one of your own comments then the following icon should appear towards the bottom-right of the comment:
Do you not see this icon? Is your comment not deleted when you press the icon?