Click on url doesn't work (intermittent)
In gnus, I'm used to being able to click the right or middle mouse
button over a URL and have my browser of choice (currently mozilla,
with a link in /usr/bin named netscape) take me there.
In my debian xemacs, intermittently it gets into a state where either
button produces a message:
Buffer changed during mouse motion
and nothing is sent to a browser.