[XFree86] HardWare Cursor in Kdrive-XFree864.3.0

Hello!

I did a hardware cursor acceleration in Kdrive-XFree864.3.0 on my
SIS6326 Card, It works well most of the time, but sometimes I found it have
several wrong pixels compared with the Non-Accelerated software cursor.
The situation can be described by the following two figures. the pixels
marked with red color is different between hardware cursor and software
cursor. I wonder whether the cursor pattern is already wrong when I got it
from XFree86.

Hardware cursor on the login window of Gnome
*
**
***
* **
*****
* ****
*******
**
Software cursor
*
**
***
****
*****
******
*******
**
Does anyone encounter the same problem with me?
Thanks