Attach to CSS Selector does not work correctly: position: absolute is at fault

There's a problem with the "Attach to CSS selector" - it doesn't result in the menu appearing in the correct place (at least on most themes). In the examples I tried, it always ended up appearing on the top-level block, because there was a relative-positioned element in between, so it positions absolutely in the wrong place on the page.

My solution is to remove the position:absolute; from the #simplemenu selector at the top of themes/original/original.css and themes/blackblue/blackblue.css, as the attached patch does.

The workaround is just to add:

to your theme's style.css.