&#160;<br />
&#62; When that happens next time, please show the exact value of the<br />
&#62; relevant timer as a Lisp data structure. (You should be able to find<br />
&#62; it in the variable timer-list.) Also, show the value returned by the<br />
&#62; function current-time at that point.<br />
<br />
Ok, will do if it happens again. I don&#39;t know what triggers it, because<br />
it happens only occasionally.<br />
<br />
The strange thing is it would be a logical explanation that emacs substracts<br />
the new time from the timer and it makes it go negative (though I haven&#39;t&#160;<br />
checked how it is implemented), but usually only one of the timers go&#160;<br />
negative, not all of them, so the bug does not affect all timers when it&#160;<br />
happens.