Index: trunk/wp-admin/includes/upgrade.php
===================================================================
--- trunk/wp-admin/includes/upgrade.php	(revision 9418)
+++ trunk/wp-admin/includes/upgrade.php	(working copy)
@@ -2,7 +2,7 @@
 /**
  * WordPress Upgrade API
  *
- * Most of the functions are pluggable and can be overwritten 
+ * Most of the functions are pluggable and can be overwritten
  *
  * @package WordPress
  * @subpackage Administration
@@ -1119,7 +1119,7 @@
 	// Create a tablename index for an array ($cqueries) of queries
 	foreach($queries as $qry) {
 		if(preg_match("|CREATE TABLE ([^ ]*)|", $qry, $matches)) {
-			$cqueries[strtolower($matches[1])] = $qry;
+			$cqueries[trim(strtolower($matches[1]), '`')] = $qry;
 			$for_update[$matches[1]] = 'Created table '.$matches[1];
 		}
 		else if(preg_match("|CREATE DATABASE ([^ ]*)|", $qry, $matches)) {
@@ -1158,7 +1158,7 @@
 				foreach($flds as $fld) {
 					// Extract the field name
 					preg_match("|^([^ ]*)|", trim($fld), $fvals);
-					$fieldname = $fvals[1];
+					$fieldname = trim($fvals[1], '`');
 
 					// Verify the found field name
 					$validfield = true;