Launchers added to a drawer work ok when initially added (except as
described below).  However, after a new login or restarting the panel, the
contents of the drawer do not function.  When opened, the slide displays
the launcher icons but they do not function if clicked and right clicking
on a launcher displays the panel dialog not the launcher dialog.

If a drawer is added to the panel directly from the panel menu, all
launchers are similarly inactive (i.e., the launchers do not work even if
the panel is not restarted).

This bug seems to be related to bugs 75589, 90443 and 120151.  I submitted
this bug report because the first two are marked resolved for earlier
versions of gnome-panel and the last, which was recently reopened,
describes the problem only in terms of keyboard access to the panel and
drawers.