Recently it was discovered that the translation status pages
(http://l10n-status.gnome.org/) had been broken w.r.t. gdm2 translations, due to
a change in gdm2. The translation status pages need to know the exact potfile
name to be able to function.
Carlos' comment:

"Seems like intltool-update generates a file with the wrong name. Yes,
that's the problem, now it's called gdm-2.6.pot. IMHO all modules that
are not libraries that lets you install two different versions at the
same time should use only the module name. It has no sense to change
the .pot file name with every version change..."

The common policy in GNOME is that libraries are supposed to be versioned, to
allow for parallell installations of different versions. This scenario seems
however very unlikely in the case of GDM, or are people really using different
versions of GDM at the same time on their systems?

In case users are not normally using several GDM versions simultaneously, please
change GETTEXT_PACKAGE (which controls the potfile name) to simply "gdm", so
that the translation status pages and other stuff depending on this need not
unnecessarily break every release cycle.