Some apps can't use overlay scrollbars

@Andrea, thanks for the tip. Left and text box scrollbar works but the right one is still the older scrollbar.

Yeah, I'm getting this old skool scrollbar for a number of common applications: firefox, gnome-terminal, LibreOffice, gvim... the list goes on.

It's not properly a bug in the scrollbar code, but we need to update the gtk+ patch.
for some apps, like firefox/libreoffice/chromium, it's a completely different story

this bug won't be fixed in natty...

Not fixing this in natty will lead to a very inconsistent design/style.
If the overlay scrollbars won't be deferred because of this, why not fix it even after the release of natty?
It's not really a new feature but fixing an exisiting one ;)
(Funny btw: the application list includes eclipse that you mentioned in the design proposal )

it's really hard to implement that safely, it's not that we want to skip this thing.

list of apps blacklisted in ubuntu 11.04: "apport-gtk", "Banshee", "deja-dup", "eclipse", "inkscape", "liferea", "lshw-gtk", "meld", "synaptic", "update-manager", "vinagre".
Apps wth inconsistency, will hopefully be addressed for 11.10

(In addition "gnome-terminal" does not use the overlay-scrollbars, but for a separate reason to do with the loader patch in Gtk+, and is not actually blacklisted as-such).

Gwibber do not use the overlay scrollbar (it use them only for one
scrollbar)

gnome-terminal and chromium-browser not showing overlay scrollbars for me (LIBOVERLAY_SCROLLBAR=1 globally on startup)

I am aware of apps not *fully* working with the overlays, I mentioned apps which expose functionality issues (eclipse for example, can't show the thumb)

I don't know if I am supposed to open a new bug, but overlay-scrollbar does not work with system-config-printer. Add a printer. Select printer make and click Forward. On the next screen are two panes but the left pane seems impossible to scroll with the scrollbar as the scrollbar is drawn outside the left pane but inside the right pane. When I try to click or drag the scrollbar, I can't because the focus switches to the right pane.

Jeremy, thanks for posting this, but this sounds like a separate bug. Could you file a new bug report for it? I've also been trying to recreate your problem, but the overlay scrollbars in the driver selection window are working as they should for me. Could you, in the new bug report, also post the version of the overlay scrollbar that you are using. A screenshot might also be useful, if you could get one.

I have reported a bug for a similar behaviour with the smb-explorer for network printer selection:
https://bugs.launchpad.net/ubuntu/+source/overlay-scrollbar/+bug/772229

Overlay scrollbars also do not work properly with Wuala, a Java application. [1] The area that can be dragged does not appear when the mouse hovers over the scrollbar.

[1] http://www.wuala.com/

Gwibber 3.0.0.1 is also not using overly-scrollbars