Very occasional fatal PHP error, "couldn't execute" autoload function
<p>I have no idea how to go about solving this very occasional funny state that PHP gets into. So any ideas whatsoever will be appreciated.</p>

<p>Maybe 3 or 4 times in the past year, my site will start returning 500 errors, and the logs show:</p>

<p>PHP Fatal error:  Couldn't execute method dw__autoload in Unknown on line 0</p>

<p>dw__autoload is registered with spl_autoload_register. When I restart apache the problem is gone and I forget about it for several months. I am running APC, php 5.3.2-1ubuntu4.10 on ubuntu 10.04.3. I realize there is not much to go on here!</p>
