Fix 'skip' section of limit clause
diff --git a/system/database/drivers/interbase/interbase_driver.php b/system/database/drivers/interbase/interbase_driver.php
index e55a476..4dca7c8 100644
--- a/system/database/drivers/interbase/interbase_driver.php
+++ b/system/database/drivers/interbase/interbase_driver.php
@@ -611,7 +611,7 @@
 			
 			if ($offset > 0)
 			{
-				$sql .= ' SKIP'. (int) $offset;
+				$sql .= ' SKIP '. (int) $offset;
 			}
 		}
 		else