am I getting old (lead fingered), or have my mice been taking steroids

[Claude Jones]

OK - with a subject line like that, this is going to be a letdown.
On two separate FC4 machines, my mice have suddenly acquired deep sensivity - 
no, they aren't crying every time I click, but they are taking single clicks 
and treating them as double. I'm skimming mail, for instance, and I click on 
the next message arrow, and two messages are marked read and the third 
message gets displayed. If I click on a message in the list to see it in the 
reading pane, it opens up its own window. Doesn't happen every time, but, 
it's happening with increasing frequency - like many times a day. I tried 
playing with the KDE (I'm running KDE-Redhat) sensitivity setting, but it 
didn't seem to help.

Any ideas? 
-- 
Claude Jones
Bluemont, VA, USA