karma form nested inside comment edit form breaks HTML and preview/submit buttons in IE

When previewing an edited comment in IE, a user cannot click the Preview or Submit buttons. This is because the karma_comment function spits out the karma rating form even during edit operations. The result of this is that, contrary to good HTML, an HTML form is being nested *inside* another, like this:

Not only that, but there are two >input type="submit"< tags in there too.

The attached patch file addresses this by checking for the 'edit' argument as arg(1), and if a comment is being edited/previewed, then it will not render the Karma form.

Users' can't rate their own posts anyway, so why even render it when a user is viewing/editing/previewing their own comment at all?

Hope this helps.