Bug#945870: Unmet Dependency on libgegl-common

[mason1920]

Package: libgegl-0.4-0
Version: 0.4.18-2
Severity: grave

Dear Maintainer,

I attempted to use GIMP, but got this error in return:
gimp: symbol lookup error: gimp: undefined symbol: gegl_rectangle_subtract

The libgegl-0.4-0 package was the issue, as I wasn't able to install it because of it's dependency on an available package.
It requires libgegl-common (>= 0.4.18-2) but 1:0.4.16-dmo2 is all that's to be installed.

What I find odd is the apt policy for libgegl-common:
libgegl-common:
  Installed: 1:0.4.16-dmo2
  Candidate: 1:0.4.16-dmo2
  Version table:
*** 1:0.4.16-dmo2 100
        100 /var/lib/dpkg/status
     0.4.18-2 500
        500 http://deb.debian.org/debian unstable/main amd64 Packages
        500 http://deb.debian.org/debian unstable/main i386 Packages

So I tried installing the available version using package=version, and APT considered it a downgrade.
Should be easy to fix the candidate, but unusable at the moment if you don't force "downgrade" it.
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