A scrubber of the overlay-scrollbar does not appear.

[Jiro Matsuzawa]

[Problem]
A scrubber[1] of the overlay-scrollbar does not appear.

[1] I mean an object to drag to scroll the viewing area of the window. I'm not sure what the widget is called.

[Steps to reproduce]
1. Preview a file which will show a scrollbar such as a long text file with sushi.
2. Have the mouse pointer hover over the scrollbar.

[Actual Result]
Hovering over the scrollbar shows no scrubber.

[Expected result]
A scrubber will appear.

----
% cat /etc/issue
Ubuntu oneiric (development branch) \n \l

% apt-cache show gnome-sushi
Package: gnome-sushi
Priority: extra
Section: universe/gnome
Installed-Size: 76
Maintainer: Ubuntu Developers <email address hidden>
Original-Maintainer: Debian GNOME Maintainers <email address hidden>
Architecture: amd64
Version: 0.2.0-0ubuntu2
Depends: libc6 (>= 2.2.5), libcairo2 (>= 1.2.4), libclutter-1.0-0 (>= 1.6.0), libclutter-gst-1.0-0 (>= 1.3.14-1build1), libclutter-gtk-1.0-0 (>= 1.0.1), libgirepository-1.0-1 (>= 0.9.2), libgjs0c (>= 0.7.1), libglib2.0-0 (>= 2.29.14), libgtk-3-0 (>= 3.0.0), gnome-sushi-common, libsushi-1.0-0, gir1.2-sushi-1.0, nautilus (>= 3.2), gir1.2-clutter-gst-1.0, gir1.2-gtkclutter-1.0
Filename: pool/universe/g/gnome-sushi/gnome-sushi_0.2.0-0ubuntu2_amd64.deb
Size: 5902
MD5sum: ceb3dc4c94d2afcfa542bb76379544fe
SHA1: ae4602f4a2b3878f8091a048736add54231c7e6c
SHA256: d80612ffd17a7a7253df76d1cf1e175668ef11777d7aa960725b44d5dae81008
Description-en: sushi is a quick previewer for nautilus
 Sushi is a GtkClutter and Javascript-based quick previewer
 for Nautilus, the GNOME desktop file manager.
 Sushi is a DBus-activated service. It is capable of previewing
 documents, PDFs, sound and video files (using Gstreamer),
 some text files, and possibly others in the future.
 .
 To activate the preview, left-click the file and hit space.
 The preview can be closed by hitting space again, or escape.
 .
 This package contains the main executable.
Homepage: http://git.gnome.org/browse/sushi
Description-md5: b8f2c0da2b8336b6701cc510055e546b
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Origin: Ubuntu

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Vadim Rutkovsky (roignac)]

Gnome sushi doesn't use overlay-scrollbar. Instead it has a customized native GTK scrollbar, which doesn't have a scrubber.

I guess, we can prepare a patch for Ubuntu to use overlay scrollbars in Sushi

[Vadim Rutkovsky (roignac)]

It seems that overlay-scrollbars don't work in Clutter - see bug #917866. Closing this as a duplicate