interface device not created when plugging in some prism2.5 PCMCIA cards

Binary package hint: linux-source-2.6.22

I have two prism2-based PCMCIA cards here that both have worked up through feisty (with the orinoco_cs driver). I've now tested the two cards with gutsy (on my T30 laptop which has gutsy installed and my wife's T22 laptop with the gutsy Tribe 4 Live CD). I'm finding that the cards' plug events are detected, but the network devices are not created.

In other words, I plug in either of the cards and get neither a wlan? nor an eth? device. This obviously prevents the card from working.

I do have another prism2-based PCMCIA card which _did_ work with gutsy, but these ones are not. I have retested with feisty, and both cards to work.

Here's what happens in syslog when I insert and eject the card:
Aug 12 02:42:18 localhost kernel: [104563.852000] pcmcia: registering new device pcmcia0.0
Aug 12 02:42:19 localhost NetworkManager: <debug> [1186900939.266280] nm_hal_device_added(): New device added (hal udi is '/org/freedesktop/Hal/devices/pcmcia__1__1').
Aug 12 02:42:49 localhost NetworkManager: <debug> [1186900969.530997] nm_hal_device_removed(): Device removed (hal udi is '/org/freedesktop/Hal/devices/pcmcia__1__1').
Aug 12 02:42:49 localhost kernel: [104595.832000] pccard: card ejected from slot 0

The hostap_cs driver does not appear to be loaded when these cards are plugged in, either.

I have an atheros-based card which _does_ work fine on both laptops.