------- Comment #14 from firstname.lastname@example.org 2007-01-29 09:11 MST ------- Uff. Very cool that you could narrow down the problem! Actually, it has more implications than you could probably imagine, because we're thinking to switch to SendCoreEvents for all devices due to issues with hotplug CorePointers. Though ATM I think that this has not implications to CorePointer only, but rather to the first mouse device only.
This is very strange. The xmodmap should work on all pointers. I'll have to check this here. Either I can reproduce this or I have to close this as WORKSFORME.
Can you try to switch CorePointer and SendCoreEvents in your xorg.conf? What happens then? And what happens when you specify SendCoreEvents for both mice?