Index: includes/install.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/install.inc,v
retrieving revision 1.31
diff -u -r1.31 install.inc
--- includes/install.inc	2 Jan 2007 05:05:38 -0000	1.31
+++ includes/install.inc	2 Feb 2007 01:30:45 -0000
@@ -62,10 +62,10 @@
  *   The currently installed schema version.
  */
 function drupal_get_installed_schema_version($module, $reset = FALSE) {
-  static $versions;
+  static $versions = array();
 
   if ($reset) {
-    unset($versions);
+    $versions = array();
   }
 
   if (!$versions) {