FC4 USB opti-mouse goes wild

[Martin, AA6E]

I have a Logitech M-BT85 optical USB mouse (with wheel).  It works
fine with FC4 [Linux version 2.6.12-1.1447_FC4] most of the time. See
lsusb output below FWIW.

Occasionally, when I'm mousing around doing nothing special, the
cursor takes off like crazy across the screen and lands somewhere at
the edge.  Really annoying!  My mouse preferences are all set to
middle values.

Have I got a bad mouse, or do we have USB / driver problems?  Is it a
known problem? Should I declare a bug?

Thanks for any clues.
-- 
martin.ewing at gmail.com
http://blog.aa6e.net
----------------------
lsusb:
Bus 003 Device 003: ID 046d:c03f Logitech, Inc.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0         8
  idVendor           0x046d Logitech, Inc.
  idProduct          0xc03f
  bcdDevice           20.00
  iManufacturer           1 Logitech
  iProduct                2 USB-PS/2 Optical Mouse
  iSerial                 0
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           34
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          0
    bmAttributes         0xa0
      Remote Wakeup
    MaxPower               98mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         3 Human Interface Devices
      bInterfaceSubClass      1 Boot Interface Subclass
      bInterfaceProtocol      2 Mouse
      iInterface              0
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.10
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      50
         Report Descriptors:
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0004  1x 4 bytes
        bInterval              10