overly-eager mouse scrolling on mac

[Sam Steingold]

In GNU Emacs 24.3.50.1 (x86_64-apple-darwin13.0.0, NS apple-appkit-1265.00)
 of 2014-01-21 on sds-MacBook-Pro.local
Windowing system distributor `Apple', version 10.3.1265
Configured using: `configure --with-ns'

Whenever I touch the mouse, emacs scrolls like crazy, starts blinking
(visible-bell is on), and *Message* contains these:

byte-code: End of buffer [5 times]
byte-code: End of buffer [5 times]
byte-code: Beginning of buffer [7 times]

lossage is:

<double-wheel-down> <wheel-right> <wheel-down> <wheel-down>
<double-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> <wheel-up>
<double-wheel-up> <wheel-down> <double-wheel-down>
<wheel-up> <double-wheel-up> <triple-wheel-up> <triple-wheel-up>
<wheel-up> <select-window> <wheel-up> <double-wheel-up>
<triple-wheel-up> <triple-wheel-up> <triple-wheel-up>
<triple-wheel-up> <triple-wheel-up> <wheel-down> <double-wheel-down>
<triple-wheel-down> <triple-wheel-down> <triple-wheel-down>
<triple-wheel-down> <triple-wheel-down> C-h l

is this a known bug?
feature?

I suspect that there is a timing parameter in the mouse handling code
which is too small...

PS. All the other applications (firefox &c) behave normally.

-- 
Sam Steingold (http://sds.podval.org/) on darwin Ns 10.3.1265
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