<html><head></head><body>Ok, thanks for the explanation. I'll take a bit more care in future. Anyway, I've done some sanity for you. <div class="gmail_quote">On 10 December 2018 14:46:03 GMT+00:00, Robie Basak <robie.basak@ubuntu.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail">On Mon, Dec 10, 2018 at 02:26:47PM +0000, Keir Wayman wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;">The email address that I sent my original email to came from inside the .deb package (attached) so I assumed a level of sanity checking had been done. </blockquote> A level of sanity checking does get done automatically, but only _against the Ubuntu release the .deb was released for_. As far as I can tell you grabbed a .deb from a future release and tried to install it into a previous release. That's the part that is not supported and no sanity checking is done for that. </pre></blockquote></div> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>