diff --git a/oss/vtiger/trunk/include/database/PearDatabase.php b/oss/vtiger/trunk/include/database/PearDatabase.php
index 9bcc07fb..30c15248 100644
--- a/oss/vtiger/trunk/include/database/PearDatabase.php
+++ b/oss/vtiger/trunk/include/database/PearDatabase.php
@@ -196,17 +196,10 @@ class PearDatabase{
 	static function &getInstance() {
 		global $adb, $log;
 
-		$multiConnection = PerformancePrefs::getBoolean('ALLOW_MULTI_DB_CONNECTION_PER_REQUEST', true);
-		if(!$multiConnection) {
-			// Reuse the instance
-			if(!isset($adb)) { 
-				$adb = new self();
-			}
-			return $adb;
-		} else {
-			// Create new instance
-			return (new self());
+		if(!isset($adb)) { 
+			$adb = new self();
 		}
+		return $adb;
 	}
 	// END	
 	
@@ -275,6 +268,14 @@ class PearDatabase{
     
     function checkError($msg='', $dieOnError=false) {
 		if($this->dieOnError || $dieOnError) {
+			$bt = debug_backtrace();
+			$ut = array();
+			foreach ($bt as $t) {
+				$ut[] = array('file'=>$t['file'],'line'=>$t['line'],'function'=>$t['function']);
+			}
+			echo '<pre>';
+			var_export($ut);
+			echo '</pre>';
 		    $this->println("ADODB error ".$msg."->[".$this->database->ErrorNo()."]".$this->database->ErrorMsg());	
 		    die ($msg."ADODB error ".$msg."->".$this->database->ErrorMsg());
 		} else {
@@ -1137,6 +1138,15 @@ class PearDatabase{
 		}		
 		return $last_insert_id;
 	}
+	
+	// Function to escape the special characters in database name based on database type.
+	function escapeDbName($dbName='') {
+		if ($dbName == '')  $dbName = $this->dbName;
+		if($this->isMySql()) {
+			$dbName = "`{$dbName}`";
+		}
+		return $dbName;
+	}
 } /* End of class */
 
 if(empty($adb)) {
@@ -1145,4 +1155,4 @@ if(empty($adb)) {
 }
 //$adb->database->setFetchMode(ADODB_FETCH_NUM);
 
-?>
+?>
\ No newline at end of file