Comment 6 for bug 1069172

On 16/12/2012 18:24, ~suv wrote:
> <off-topic>
>> On Windows XP, they are replaced with a long black rectangle...
>
> I also get those with the Quartz backend builds (GTK+/Quartz 3.6.2,
> gtkmm3 3.6.0, gdl3 3.6.2, glib2 2.34.3) - the same for the background
> of the thumbnail preview in the file dialogs.
>
> Interestingly wit the same builds, the rulers are ok with the Unico
> theme engine, but black with Adwaita, and stock (i.e. no) theme
> engine. </off-topic>

Correcttion: AFAICT it's not about the theme _engine_, but about the particular theme itself: Ubuntu light themes and e.g. Zukitwo do style the ruler background as expected, but Adwaita (or the stock theme) doesn't: the latest version of Zukitwo (for Gnome 3.6) has migrated from Unico to Adwaita, and still renders the rulers as expected [1].

Possibly this is due to GtkRuler no longer being an official widget of GTK+ >= 3.6?

[1] <http://gnome-look.org/content/show.php?content=140562>