Hi
I experienced a similar erratic mouse problem.I am running Warp4 on older system.
I bought a new flat panel display.
I upgraded to SNAP commercial.
I had a wheel mouse, and then a new 2-button mouse.
Both are PS/2 style. Both acted crazily.
I tried all the software options I could find.
Today I found this:
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IBM had updated the Single Mouse Driver (01/18/2005) and it is available for free download at:
http://service.software.ibm.com/os2dd/free/SingleMouse/smouse.exe
From: madodelDESPAM@ptdprolog.net
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here on OS2World.com
I installed the single mouse driver and it WORKS!!!
I hope it does the same for your troubled mouse
Dave