Addendum: Apparently, the only change in the Ubuntu package is the use of autoreconf. However, a superficial glance at the library files reveals that the Debian version is so 5 kB larger than the Ubuntu version. If you can confirm the problem with a daily build of qpdfview, I think this bug should be assigned to the libspectre package.
Addendum: Apparently, the only change in the Ubuntu package is the use of autoreconf. However, a superficial glance at the library files reveals that the Debian version is so 5 kB larger than the Ubuntu version. If you can confirm the problem with a daily build of qpdfview, I think this bug should be assigned to the libspectre package.