I've the same problem, though my policy output is different:
# apt-cache policy libgtk2.0-0 libgtk2.0-dev
libgtk2.0-0:
Installed: 2.8.6-0ubuntu2.1
Candidate: 2.8.6-0ubuntu2.1
Version table:
*** 2.8.6-0ubuntu2.1 0
100 /var/lib/dpkg/status
2.8.6-0ubuntu2 0
500
fixed with the help of a friend
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Won't install due to package conflict with libgtk2.0-0
https://launchpad.net/malone/bugs/34938
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