Comment 4 for bug 95177

A couple of workarounds from bug 242231:
Add [a second row of] workspaces or remove the acceptance dialog in the preferences

Also, if you do *not* have Visual Effects enabled, you *can* Alt-drag the dialog beyond the top of the screen (at least, it works for me). So, running “metacity --replace” is a quick way of enabling moving the dialog, with the expense of losing effects till next login (or compiz is restarted).