The user knows the program worked yesterday, before (s)he upgraded the OS. Correlation is not causation, but I think you will get more hits googling &quot;&lt;OS&gt; update breaks &lt;application name&gt;&quot; than googling &quot;&lt;OS&gt; update uncovers bugs in &lt;application name&gt;&quot; for whatever currently used choices you pick for &quot;&lt;OS&gt;&quot; and &quot;&lt;application name&gt;&quot;.