If you're not giving the user a choice, why notify the user? It's not like he/she can do anything about it with a single button. If it's something important, give the user a choice to avoid the outcome. If it's not important enough to warrant a choice, you might be better off notifying the user via a status bar (or notification popup, but we hate those too). Jure, what does your usability-expertise say on this?

On interesting dialogs, this: http://alextreme.org/gfx/verpl_of_kopieren.png IE dialog is probably as good as I get them (Dutch: Do you want to move or copy files out of this zone? Buttons: Yes / No). It's probably due to a sloppy translator though, not a logical error by the developers themselves.

On the QA tool: perhaps it's simply a better idea to just add a new line to your QA guide to check all dialog boxes for logical questions? I'm all for NLP, but there are likely to be other problems with dialog boxes beyond this example.

Sadly this has often led to accidentally dropping too many tables or something out of a database, but hey, backup. And I do think many of these dialog boxes could be dealt away with by software having a revision system in place so you can just rollback if you screw something up.

Dialog boxes are evil.