modemmanager broken?

[wp1191918-hgvs <hg van-schelve de>]

Hi,

I have updated network-manager, network-manager-applet and modem-manager
to the following git versions:
modemmanager	1:0.3.1~git.20100525t222447.6c3ae7d-1hgvs
network-manager	1:0.8.1~git.20100526t083526.8bd5168-1hgvs
network-manager-gnome	1:0.8.1~git.20100526t065235.25dedfb-1hgvs

Now I have the problem, that the internal sierra 3g modem does not get
initialized by modem-manager. In /var/log/syslog I see the following
looping messages:

.....
May 31 10:05:28 nc0631 modem-manager: (tty/ttyUSB0): outstanding support
task prevents export of /sys/devices/pci0000:00/0000:00:1d.1/usb6/6-1
May 31 10:05:28 nc0631 modem-manager: (tty/ttyUSB0): outstanding support
task prevents export of /sys/devices/pci0000:00/0000:00:1d.1/usb6/6-1
.....

The complete syslog is on patebin.com:

http://pastebin.com/download.php?i=HW39cShc

The interesting thing is: it sometimes work but sometimes not. It looks
like that everything is fine when first starting network-manager /
modem-manager
and then enable the device. When I change this sequence - first starting
the device, then starting nm / mm it fails.

Any ideas?

-- Hans-Gerd