I'm having the same problem. There is definately something wrong with the files on one of the repositories.
libgtk2.0-dev: Depends: libgtk2.0-0 (= 2.10.6-0ubuntu3) but 2.10.6-0ubuntu3.1 is to be installed This is right. I see that libgtk2.0 with the 3.1 sub-version is in fact installed, and the libgtk2.0-dev package does require the 3.0 version. $ apt-cache policy Package files: 100 /var/lib/dpkg/status release a=now 500 http://security.ubuntu.com edgy-security/universe Packages release v=6.10,o=Ubuntu,a=edgy-security,l=Ubuntu,c=universe origin security.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/multiverse Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=multiverse origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/universe Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=universe origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/restricted Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-backports/main Packages release v=6.10,o=Ubuntu,a=edgy-backports,l=Ubuntu,c=main origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-updates/restricted Packages release v=6.10,o=Ubuntu,a=edgy-updates,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy-updates/main Packages release v=6.10,o=Ubuntu,a=edgy-updates,l=Ubuntu,c=main origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/universe Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=universe origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/restricted Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=restricted origin de.archive.ubuntu.com 500 http://de.archive.ubuntu.com edgy/main Packages release v=6.10,o=Ubuntu,a=edgy,l=Ubuntu,c=main origin de.archive.ubuntu.com and: $ policy libgtk2.0-dev libgtk2.0-dev: Installed: (none) Candidate: 2.10.6-0ubuntu3 Version table: 2.10.6-0ubuntu3 0 500 http://de.archive.ubuntu.com edgy-updates/main Packages 2.10.6-0ubuntu1 0 500 http://de.archive.ubuntu.com edgy/main Packages [ -- [Edgy] Broken packages while trying to install libgtk2.0-dev https://launchpad.net/bugs/49220 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs