Hi Doug,
I have never seen this anywhere. Alt-LMB allows changing an object name.
Are you sure that you aren't mixing extenders, and they are interfering with each other?
Well, you had me thinking this through, since it's been quite a while that I've been running this particular configuration. So I did go through all my stuff and X-it is really the only other add-on. However, looking through the system setups I found this in my MOUSE object, specifically the 'Mappings' tab, see attached screenshot.
I do use the IBM ScrollPoint Pro mouse here, and as best as I can remember I have always used the IBM mouse drivers. Also attached a screenshot of the driver info, meanwhile here is the bldlevel output:
[G:\os2\boot]bldlevel mouse.sys
Build Level Display Facility Version 6.12.675 Sep 25 2001
(C) Copyright IBM Corporation 1993-2001
Signature: @#IBM:10.152#@ OS/2 Mouse Device Driver
Vendor: IBM
Revision: 10.152
File Version: 10.152
Description: OS/2 Mouse Device Driver