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Description of problem:
Small down arrows (I hope they are called "tree twisties") in tree view in Evolution stop working after som time of using Evolution.

Any suggestion how to debug it will be appreciated.

Version-Release number of selected component (if applicable):
evolution-2.32.3-9.el6

How reproducible:
100%

Steps to Reproduce:
1. start evolution and use it for some time 
2. try to wrap/unwrap some submenus in Evo's tree view on left
3.

Actual results:
cant wrap/unwrap submenu

Expected results:
should work

Additional info:

This is a GTK+ issue:
https://bugzilla.gnome.org/show_bug.cgi?id=581050

Something to do with the interaction between GtkStatusIcon and GtkTreeView.

Never got fully investigated by GTK+ maintainers.  We stopped using GtkStatusIcon about the time we ported to gtk3 and the problem went away on its own.

I tested the proposed upstream patch and indeed, it fixes the issue. I suggest to include the patch into the gtk2 update.

The patch has landed in GTK2 upstream, so it should be fine to include:

commit b32a9eb691920f21ad3b9127c833aaba15727c4b
Author: Michael Natterer <mitch>
Date:   Thu May 31 11:02:09 2012 +0200

    GtkTreeView: make tree expanding/collapsing more robust

    gtk_grab_remove() *after* we did the expanding/collapsing, otherwise
    grab_notify() might kick in and mess with our state. Fixes bug #675835.

 gtk/gtktreeview.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Thanks Benjamin, I'm committing this to sources.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1544.html