Imagemagick changes dimensions when flattening some images.

[NoBugs!]

Imagemagick is changing the dimensions of some images when flattening. See attached script for example, it makes the output images bigger than it should be in this case.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: imagemagick 8:6.7.7.10-6ubuntu3
ProcVersionSignature: Ubuntu 3.19.0-32.37~14.04.1-generic 3.19.8-ckt7
Uname: Linux 3.19.0-32-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.18
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Nov 6 17:50:06 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-11-23 (713 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: imagemagick
UpgradeStatus: Upgraded to trusty on 2014-04-19 (566 days ago)

[NoBugs! (luke32j)]

This is still happening, on 14.04. Any suggestions, or any way I could make this bug report have more valuable debug info? Should I report the bug to http://www.imagemagick.org/script/contact.php instead?

[NoBugs! (luke32j)]

It is still happening, what bug tracker can I add this to to get it looked into?

Thanks in advance