Seahorse gives conflicting information about ID photos

Binary package hint: seahorse

PGP specifies 120×144 as the maximum image resolution for ID photos, whilst GPG recommends the usage of 240×288. Seahorse, on the other hand, tells you to make your JPEG 120×150!

I read this, and so went to GIMP to edit my photo. However, Seahorse still told me to make it 120×150, even though those were its exact dimensions! I eventually tried saving it at 20% JPEG quality, and Seahorse accepted it. It is clear that Seahorse was doing a filesize check on the image, and wrongly claiming that image dimensions were the problem.

I then tried a PNG version of the same photo. It was accepted without complaint. However, when I looked, I realised that it had be automatically converted (without telling me) into a low-quality JPEG. Strangely, the dimensions of this JPEG were 192×192, for 7.6kB. It didn’t bring it down to the 120×150 it claimed it wanted.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/seahorse
NonfreeKernelModules: nvidia
Package: seahorse 2.26.1-0ubuntu1
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: seahorse
Uname: Linux 2.6.28-15-generic x86_64