Bluetooth mouse wheel issues

for a few weeks now i had issues with the mouse wheel of my Dell Bluetooth Travel Mouse. From time to time the wheel suddenly starts flipping direction or has dropouts.
This occurs on two openSuse 11.3 systems with different bluetooth adapters. Reconnecting the mouse doesn’t help.
I could not reproduce this under WinXP.
A USB mouse works fine, though.

The bluetooth shouldn’t matter here. Are the batteries fully loaded? Besides that you may want to check what mouse type is detected in Linux

How that?
I checked in yast and it looks plausible:

59: PS/2 00.0: 10500 PS/2 Mouse
  [Created at input.183]
  Unique ID: AH6Q.dx+TepKS+pF
  Hardware Class: mouse
  Model: "Dell BT Travel Mouse"
  Vendor: 0x046d 
  Device: 0xb006 "Dell BT Travel Mouse"
  Compatible to: int 0x0210 0x0028
  Device File: /dev/input/mice (/dev/input/mouse2)
  Device Files: /dev/input/mice, /dev/input/mouse2, /dev/input/event11, /dev/char/13:75, /dev/input/by-id/usb-413c_8140-event-mouse, /dev/input/by-path/pci-0000:00:1a.0-usb-0:2:1.0-event-mouse, /dev/char/13:34, /dev/input/by-id/usb-413c_8140-mouse, /dev/input/by-path/pci-0000:00:1a.0-usb-0:2:1.0-mouse, /dev/char/13:63
  Device Number: char 13:63 (char 13:34)
  Driver Info #0:
    Buttons: 8
    Wheels: 2
    XFree86 Protocol: explorerps/2
    GPM Protocol: exps2
  Config Status: cfg=no, avail=yes, need=no, active=unknown