Package: monodoc-gmime2.6-manual Version: 2.6.23+dfsg1-1 Severity: serious monodoc-gmime2.6-manual depends on monodoc-browser | monodoc-viewer but monodoc-browser is being removed now because it depends on the old webkit1. See https://bugs.debian.org/871831
Maybe you should make monodoc-gmime2.6-manual a transitional package depending on libgmime-2.6-doc ? Thanks, Jeremy Bicha