Gdm 2.28.0-1 and virtual desktops

Hi,
Recently updated to gdm 2.28.0-1 and it has a whole new look, and is possibly the cause of a new problem. I run openbox via the openbox session option available in gdm, and I noticed today that my virtual desktops are not what I specified in my rc.xml. Speaking with the openbox developers, I got some specific information:
On the root window, _NET_NUMBER_OF_DESKTOPS has already been set at time of openbox startup, and openbox respects that and does not set a new value from its config. Is this new behavior known/expected? Any way I can get it to stop doing that?
thanks.

I've found some bugs on the issue:
https://bugzilla.redhat.com/show_bug.cgi?id=444135
http://bugzilla.icculus.org/show_bug.cgi?id=4040
Slightly surprised I haven't encountered it until now. I may just ditch gdm, but I sortof like using it - for the odd occasion I want a different session, or I use to shutdown/reboot.

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Gdm 2.28.0-1 and virtual desktops

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