This bug still exists in Oneiric with the latest kernel packages, using an Apple Magic Trackpad. It's definitely not fixed:
Linux emu 3.0.0-11-generic #17-Ubuntu SMP Fri Sep 9 17:48:40 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
/var/log/syslog:
Sep 13 12:11:59 emu kernel: [ 177.629881] input: Apple Wireless Trackpad as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7/2-1.7:1.0/bluetooth/hci0/hci0:21/input10
Sep 13 12:11:59 emu kernel: [ 177.629976] magicmouse 0005:05AC:030E.0003: input,hidraw2: BLUETOOTH HID v1.60 Mouse [Apple Wireless Trackpad] on 00:26:83:2F:CB:20
Sep 13 12:11:59 emu kernel: [ 177.787099] magicmouse 0005:05AC:030E.0003: unable to request touch data (-5)
Sep 13 12:12:00 emu kernel: [ 178.147287] magicmouse: probe of 0005:05AC:030E.0003 failed with error -5
This bug still exists in Oneiric with the latest kernel packages, using an Apple Magic Trackpad. It's definitely not fixed:
Linux emu 3.0.0-11-generic #17-Ubuntu SMP Fri Sep 9 17:48:40 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
/var/log/syslog: pci0000: 00/0000: 00:1d.0/ usb2/2- 1/2-1.7/ 2-1.7:1. 0/bluetooth/ hci0/hci0: 21/input10 030E.0003: input,hidraw2: BLUETOOTH HID v1.60 Mouse [Apple Wireless Trackpad] on 00:26:83:2F:CB:20 030E.0003: unable to request touch data (-5)
Sep 13 12:11:59 emu kernel: [ 177.629881] input: Apple Wireless Trackpad as /devices/
Sep 13 12:11:59 emu kernel: [ 177.629976] magicmouse 0005:05AC:
Sep 13 12:11:59 emu kernel: [ 177.787099] magicmouse 0005:05AC:
Sep 13 12:12:00 emu kernel: [ 178.147287] magicmouse: probe of 0005:05AC:030E.0003 failed with error -5