ubuntu-7.10 and wireless channel search

[Ed Arnold]

I'm a Ubuntu Newbie who just installed Ubuntu 7.10 on a Dell D810
laptop, which has a Intel PRO/Wireless 2200BG card.

This machine is dual-boot; the other OS is XP.  When I boot XP, I can
change the channel number on my wireless router from 6 to 11, and XP's
wireless driver sees the change and does the right thing.  (I really want
to change to channel 11, because my neighbors are all crowded together on
channel 6.)

When I boot Ubuntu, wireless works fine so long as my wireless router
is set to channel 6.  As soon as I change the channel to 11, Ubuntu is
permanently off the net.  I can restart as many times as I like, and
fiddle with the networking icon to select my wireless network, but I
can't get connected.

My question is: how do I find out if the inability of Ubuntu's wireless
driver to do channel search, is a problem already known to the Debian/
Ubuntu developers?