Debian testing: alt-tab doesn't switch windows on LXDE

[Steinar Bang <sb@dod.no>]

Platform: Intel P4
	  Intel graphics card
          debian testing
          gdm3 3.0.4-4
          lxde 0.5.5-1
          openbox 3.4.11.2-2

I installed the lxde desktop, and it works fine, except that Alt-Tab
doesn't work for switching windows, and Alt-F2 doesn't pop up a "run
command" dialog box.

As far as I can tell by googling, both shortcuts are supposed to work in
the openbox WM.

The ~/.config/openbox/lxde-rc.xml config file, has the following:
    ...
    <keybind key="A-Tab">
      <action name="NextWindow"/>
    </keybind>
    <keybind key="A-S-Tab">
      <action name="PreviousWindow"/>
    </keybind>
    <keybind key="C-A-Tab">
      <action name="NextWindow">
        <panels>yes</panels>
        <desktop>yes</desktop>
      </action>
    </keybind>
    <!-- Keybindings for running applications -->
    ...
    <keybind key="A-F2">
      <action name="Execute">
        <command>lxpanelctl run</command>
      </action>
    </keybind>
    ...

So the config should be OK.

The Alt-Tab event is picked up by the applications.  Eg. emacs tries to
do expand, in many modes, and indent in some.  So there is nothing
sitting on top grabbing them.

Has anyone else seen this?  Do you know any tricks to try?  Any
debugging tricks?

Thanks!


- Steinar