$key variable in mysite_get_includes()

When I deployed the module to a server running PHP 4.x, I found that the $key variable was getting reinitialized on line 2990
$includes[$mykey] = file_scan_directory($dir, $mask, $nomask = array('.', '..', 'CVS'), $callback = 0, $recurse = FALSE, $key = 'name', $min_depth = 0, $depth = 0);. The same code worked fine in my dev environment, where I'm running PHP 5.2. Not a PHP expert, so I don't know what's causing the issue on the server.

This caused mysite_plugin_failure() to keep getting triggered, even though the plugin existed. The patch I applied was simply to rename the $key variable to something else, say $mykey, and the problem was resolved.