Index: includes/install.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/install.inc,v
retrieving revision 1.142
diff -u -p -r1.142 install.inc
--- includes/install.inc	22 Aug 2010 15:31:18 -0000	1.142
+++ includes/install.inc	24 Aug 2010 19:41:16 -0000
@@ -587,6 +587,24 @@ function drupal_install_system() {
  *   The modules to uninstall.
  */
 function drupal_uninstall_modules($module_list = array()) {
+  // Get all module data so we can sort.
+  $module_data = system_rebuild_module_data();
+  // Create an associative array with weights as values.
+  $module_list = array_flip(array_values($module_list));
+
+  while (list($module) = each($module_list)) {
+    if (!isset($module_data[$module]) || drupal_get_installed_schema_version($module) == SCHEMA_UNINSTALLED) {
+      // This module doesn't exist or is already uninstalled, skip it.
+      unset($module_list[$module]);
+      continue;
+    }
+    $module_list[$module] = $module_data[$module]->sort;
+  }
+
+  // Sort the module list by pre-calculated weights.
+  asort($module_list);
+  $module_list = array_keys($module_list);
+
   foreach ($module_list as $module) {
     // First, retrieve all the module's menu paths from db.
     drupal_load('module', $module);