--- link.c.old	Mon Oct  5 01:22:17 1998
+++ link.c	Tue Nov 10 23:53:58 1998
@@ -175,6 +175,7 @@
 		php3_error(E_WARNING, "Unlink failed (%s)", strerror(errno));
 		RETURN_FALSE;
 	}
+	php3_clearstatcache(INTERNAL_FUNCTION_PARAM_PASSTHRU);
 	RETURN_TRUE;
 }
 

might be a possible fix for this one... If I do an unlink operation on a file that I have been statting (i.e. file_exists()) and I stat right after I have unlinked it, the file seems to still exist after I have unlinked it, because the cache is still active. This is a work-around, and no doubt you guys have a far more elegant solution in mind....