This is the error message i get on Feisty Fawn, when i plug my wifi card out and back in:

Jun 18 21:13:23 laptop kernel: [  704.816000] pccard: card ejected from slot 0
Jun 18 21:13:23 laptop kernel: [  704.852000] PCMCIA: socket f7882c28: *** DANGER *** unable to remove socket power
Jun 18 21:13:34 laptop kernel: [  716.004000] pccard: CardBus card inserted into slot 0
Jun 18 21:13:34 laptop kernel: [  716.004000] PCI: Enabling device 0000:03:00.0 (0000 -> 0002)
Jun 18 21:13:34 laptop kernel: [  716.004000] ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 18 (level, low) -> IRQ 17
Jun 18 21:13:34 laptop kernel: [  716.004000] PCI: Setting latency timer of device 0000:03:00.0 to 64
Jun 18 21:13:34 laptop kernel: [  716.088000] p54: LM86 firmware
Jun 18 21:13:36 laptop kernel: [  718.272000] 0000:03:00.0 (prism54pci): Cannot read eeprom!
Jun 18 21:13:36 laptop kernel: [  718.272000] ACPI: PCI interrupt for device 0000:03:00.0 disabled
Jun 18 21:13:36 laptop kernel: [  718.272000] prism54pci: probe of 0000:03:00.0 failed with error -22
Jun 18 21:13:36 laptop kernel: [  718.272000] pci 0000:03:00.0: Error adding device, continuing
Jun 18 21:13:36 laptop kernel: [  718.272000] ------------[ cut here ]------------
Jun 18 21:13:36 laptop kernel: [  718.272000] kernel BUG at drivers/pci/bus.c:127!
Jun 18 21:13:36 laptop kernel: [  718.272000] invalid opcode: 0000 [#1]
Jun 18 21:13:36 laptop kernel: [  718.272000] SMP 
Jun 18 21:13:36 laptop kernel: [  718.272000] Modules linked in: binfmt_misc i915 drm cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand freq_table cpufreq_conservative tc1100_wmi pcc_acpi dev_acpi sony_acpi video sbs i2c_ec i2c_core dock button battery container ac asus_acpi backlight af_packet sbp2 parport_pc lp parport prism54pci prism54common mac80211 cfg80211 pcmcia joydev snd_hda_intel snd_hda_codec yenta_socket rsrc_nonstatic snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy snd_seq_oss pcmcia_core snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device psmouse pcspkr iTCO_wdt iTCO_vendor_support snd soundcore snd_page_alloc intel_agp serio_raw shpchp pci_hotplug agpgart evdev tsdev ext3 jbd mbcache sg sr_mod cdrom sd_mod ata_piix ata_generic libata scsi_mod b44 mii ohci1394 ieee1394 generic ehci_hcd uhci_hcd usbcore thermal processor fan fbcon tileblit font bitblit softcursor vesafb capability commoncap
Jun 18 21:13:36 laptop kernel: [  718.272000] CPU:    0
Jun 18 21:13:36 laptop kernel: [  718.272000] EIP:    0060:[pci_bus_add_devices+271/288]    Not tainted VLI
Jun 18 21:13:36 laptop kernel: [  718.272000] EFLAGS: 00010246   (2.6.20-16-generic #2)
Jun 18 21:13:36 laptop kernel: [  718.272000] EIP is at pci_bus_add_devices+0x10f/0x120
Jun 18 21:13:36 laptop kernel: [  718.272000] eax: f291e808   ebx: f291e800   ecx: 00000046   edx: 00000000
Jun 18 21:13:36 laptop kernel: [  718.272000] esi: df892414   edi: df892414   ebp: df892400   esp: f7939f38
Jun 18 21:13:36 laptop kernel: [  718.272000] ds: 007b   es: 007b   ss: 0068
Jun 18 21:13:36 laptop kernel: [  718.272000] Process pccardd (pid: 3567, ti=f7938000 task=f7920a90 task.ti=f7938000)
Jun 18 21:13:36 laptop kernel: [  718.272000] Stack: c037b818 c0372834 f291e900 df89240c df892414 df892400 f7882c28 f8af10b8 
Jun 18 21:13:36 laptop kernel: [  718.272000]        f7882d78 00000002 f7882c28 00000000 f7882d78 f7882d48 f8aed7e7 f8af17e4 
Jun 18 21:13:36 laptop kernel: [  718.272000]        f8af15be 00000000 f7882c28 00000080 f7882c28 f8aede9e c17f6c40 00000000 
Jun 18 21:13:36 laptop kernel: [  718.272000] Call Trace:
Jun 18 21:13:36 laptop kernel: [  718.272000]  [<f8af10b8>] cb_alloc+0x98/0xd0 [pcmcia_core]
Jun 18 21:13:36 laptop kernel: [  718.272000]  [<f8aed7e7>] socket_insert+0xa7/0xf0 [pcmcia_core]
Jun 18 21:13:36 laptop kernel: [  718.272000]  [<f8aede9e>] pccardd+0x20e/0x240 [pcmcia_core]
Jun 18 21:13:36 laptop kernel: [  718.272000]  [default_wake_function+0/16] default_wake_function+0x0/0x10
Jun 18 21:13:36 laptop kernel: [  718.272000]  [<f8aedc90>] pccardd+0x0/0x240 [pcmcia_core]
Jun 18 21:13:36 laptop kernel: [  718.272000]  [kthread+186/240] kthread+0xba/0xf0
Jun 18 21:13:36 laptop kernel: [  718.272000]  [kthread+0/240] kthread+0x0/0xf0
Jun 18 21:13:36 laptop kernel: [  718.272000]  [kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
Jun 18 21:13:36 laptop kernel: [  718.272000]  =======================
Jun 18 21:13:36 laptop kernel: [  718.272000] Code: 43 48 e8 55 e4 05 00 8d 93 00 01 00 00 89 54 24 08 89 44 24 04 c7 04 24 44 b8 37 c0 e8 0b 01 f3 ff eb 8a 83 c4 0c 5b 5e 5f 5d c3 <0f> 0b eb fe 8d b6 00 00 00 00 8d bc 27 00 00 00 00 55 89 d5 57 
Jun 18 21:13:36 laptop kernel: [  718.272000] EIP: [pci_bus_add_devices+271/288] pci_bus_add_devices+0x10f/0x120 SS:ESP 0068:f7939f38