Optionkey always returns "up"

[Jan Decroos]

Hi All,

It happens from time to time one of our users can't use "the optionKey" as a
modifier anymore.  It returns (after a while) always "up".  We currently don't
know what's the reason of this : is it Revolution, is it the Finder, is it
AppleShare, is it a kernel extension, ... ??

The user has to logout (in the Finder) to have the optionKey available again. 
Quitting the application isn't enough.

Has anyone the same expierence ?

Regards,
Jan