Mobile Broadband -> Disconnect option broken?

[Raul Gutierrez Segales <rgs rieder net py>]

Hi,

I am running Network Manager version 0.7.1~rc4.1.cf199a964-0ubuntu2 on
Ubuntu 9.04.

For some reason that I haven't been able to debug yet, the
network-manager-applet completely ignores the disconnect command for 3G
GSM connection. 

My 3G modem is a (output from lsusb) :

Bus 005 Device 002: ID 12d1:1003 Huawei Technologies Co., Ltd. E220
HSDPA Modem / E270 HSDPA/HSUPA Modem

Is this known to be broken? Seems like a matter of capturing the event
and killing pppd (I have to do it by hand now..).