Pointer disappears when changing displays

Often when I have been working on my PB at the office, then put it to sleep and take it home and plug it into my 20" display and wake it up, there is no mouse pointer visible on the screen. The windows I was working on will have transferred to the big display, and I can tell the mouse is working, because if I move the mouse all the way to the right where the dock is and move it up and down I can see the different dock icons highlight. Occasionally I can move the mouse by "dead reckoning" to a button I need to click to save a file but usually I cannot, and sometimes the results are disastrous, I end up having to force-reboot and lose a lot of work. The problem happens in the other direction also (PB operating closed w/ 20", unplug display, goes to sleep, pointer lost when waking up.) Today that happened and I decided not to use the PB at the office. When I brought it home and plugged it into the display the pointer came back.
I have a hunch this happens more often when a Java-based app is running but I'm not sure.
Any suggestions on how to avoid this? I should be able to do this without problems, right?
Thanks
chet

Welcome to the discussions, Chester
As far as I remember, this was a bug in later versions of OS X 10.3. I used to suffer from it too until I upgraded to Tiger (10.4), which cleared it up. I don't think it has anything to do with Java, because I rarely use Java apps and It used to happen to me a lot.

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