| I just ran into an interesting issue when trying to export the Issue Checklist.
It appears that if the dialog box comes up with Selected Issues chosen, or if you choose Selected Issues but cancel the subsequent selection box, you become unable to Export or Save to Web, and possibly printing or preview (though I haven't checked those yet).
Choosing All doesn't "reset" the buttons, either. The only thing I've found that fixes it is to select issues. That will then cause the All choice to work again. Looks like something got missed in that dialog box when choosing All Issues.
Oh, and this is in 12.1.9, so you may have already caught this one for .10.