GNOME Bugzilla – Bug 618140
Growing notification area
Last modified: 2011-04-06 12:01:21 UTC
When applications constantly display and remove an icon in the notification area, it seems that a one pixel vertical line is left behind. After a while, the notification area occupies more and more space even if empty. Closing the application responsible for the icon seems to free some space. For example, it happens with Pidgin when configured to show an icon only when there is an unread message. Closing Pidgin restores the original state of the notification area. I've seen this on Ubuntu 10.04 with "gnome-panel 1:2.30.0-0ubuntu1". The bug has been also reported here https://bugs.launchpad.net/gnome-panel/+bug/530639 by David Kedves.
*** Bug 618265 has been marked as a duplicate of this bug. ***
Noticed the same thing, also with Pidgin on Ubuntu 10.04, it's annoying but can be worked around - removing the notification area from the panel then re-adding it will reset the size of the thing, and killing gnome-panel also resets the size of the notification area once the panel starts again.
I fixed this for 3.0: http://git.gnome.org/browse/gnome-panel/commit/?id=41d0e690edfe952a4ff8b8f6ea01cb9cb09695f7