Index: branches/unlabeled/unlabeled-1.170.2/core/kernel/application.php
===================================================================
diff -u -r7828 -r7837
--- branches/unlabeled/unlabeled-1.170.2/core/kernel/application.php	(.../application.php)	(revision 7828)
+++ branches/unlabeled/unlabeled-1.170.2/core/kernel/application.php	(.../application.php)	(revision 7837)
@@ -320,6 +320,11 @@
 
 	function refreshModuleInfo()
 	{
+		if (defined('IS_INSTALL') && IS_INSTALL && !$this->TableFound('Modules')) {
+			$this->registerModuleConstants();
+			return false;
+		}
+		
 		$modules_helper =& $this->recallObject('ModulesHelper');
 		$sql = 'SELECT *
 				FROM '.TABLE_PREFIX.'Modules
@@ -1723,6 +1728,10 @@
 		$res = isset($this->ConfigHash[$name]) ? $this->ConfigHash[$name] : false;
 		if ($res !== false) return $res;
 
+		if (defined('IS_INSTALL') && IS_INSTALL && !$this->TableFound('ConfigurationValues')) {
+			return false;
+		}
+		
 		$res = $this->Conn->GetRow('SELECT VariableId, VariableValue FROM '.TABLE_PREFIX.'ConfigurationValues WHERE VariableName = '.$this->Conn->qstr($name));
 		if ($res) {
 			$this->ConfigHash[$name] = $res['VariableValue'];
@@ -2065,7 +2074,6 @@
 		if ( isset($this->Debugger) )
 		{
 			$errorLevel = constOn('DBG_SQL_FAILURE') && !defined('IS_INSTALL') ? E_USER_ERROR : E_USER_WARNING;
-			$this->Debugger->dumpVars($_REQUEST);
 			$this->Debugger->appendTrace();
 
 			$error_msg = '<span class="debug_error">'.$msg.' ('.$code.')</span><br><a href="javascript:$Debugger.SetClipboard(\''.htmlspecialchars($sql).'\');"><b>SQL</b></a>: '.$this->Debugger->formatSQL($sql);
@@ -2438,6 +2446,27 @@
 		
 		return $is_spider;
 	}
+	
+	/**
+	 * Allows to detect table's presense in database
+	 *
+	 * @param string $table_name
+	 * @return bool
+	 */
+	function TableFound($table_name)
+	{
+		static $table_found = Array();
+		
+		if (!preg_match('/^'.preg_quote(TABLE_PREFIX, '/').'(.*)/', $table_name)) {
+			$table_name = TABLE_PREFIX.$table_name;
+		}
+		
+		if (!isset($table_found[$table_name])) {
+			$table_found[$table_name] = $this->Conn->Query('SHOW TABLES LIKE "'.$table_name.'"');
+		}
+		
+		return $table_found[$table_name];
+	}
 }
 
 ?>
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