--- uc_auction.module	2009-09-25 19:14:11.000000000 +0200
+++ uc_auction.module	2010-08-15 22:48:50.000000000 +0200
@@ -1132,6 +1132,9 @@ function uc_auction_bid_del_conf_submit(
     $max = db_result(db_query('SELECT MAX(bid) AS bid FROM {uc_auction_bids} WHERE nid = %d', $node->nid));
     
     // Update uc_auction
+    if (!isset ($max['bid'])) {
+        $max['bid'] = 0;
+    }
     $auc_record = array(
       'nid' => $node->nid,
       'high_bid' => $max['bid'],