Index: core/install/install_schema.sql
===================================================================
--- core/install/install_schema.sql	(revision 14318)
+++ core/install/install_schema.sql	(working copy)
@@ -1029,7 +1029,7 @@
   FormId int(11) NOT NULL DEFAULT '0',
   SubmissionTime int(11) DEFAULT NULL,
   IPAddress varchar(15) NOT NULL DEFAULT '',
-  ReferrerURL varchar(255) NOT NULL DEFAULT '',
+  ReferrerURL text NULL,
   LogStatus tinyint(3) unsigned NOT NULL DEFAULT '2',
   LastUpdatedOn int(10) unsigned DEFAULT NULL,
   Notes text,
Index: core/install/upgrades.sql
===================================================================
--- core/install/upgrades.sql	(revision 14318)
+++ core/install/upgrades.sql	(working copy)
@@ -2016,4 +2016,7 @@
 	'LA_FLD_SELECTORNAME'
 );
 
-# ===== v 5.1.2 =====
\ No newline at end of file
+# ===== v 5.1.2 =====
+	
+# ===== v 5.1.3-B1 =====
+ALTER TABLE FormSubmissions	CHANGE ReferrerURL ReferrerURL TEXT NULL;
\ No newline at end of file
Index: core/units/forms/form_submissions/form_submissions_config.php
===================================================================
--- core/units/forms/form_submissions/form_submissions_config.php	(revision 14318)
+++ core/units/forms/form_submissions/form_submissions_config.php	(working copy)
@@ -124,7 +124,7 @@
 						'FormId' => Array('type' => 'int','not_null' => '1','default' => 0),
 						'SubmissionTime' => Array('type' => 'int', 'formatter' => 'kDateFormatter', 'default' => '#NOW#'),
 						'IPAddress' => Array ('type' => 'string', 'max_len' => 15, 'not_null' => 1, 'default' => ''),
-						'ReferrerURL' => Array ('type' => 'string', 'max_len' => 255, 'not_null' => 1, 'default' => ''),
+						'ReferrerURL' => Array ('type' => 'string', 'default' => NULL),
 
 						'LogStatus' => Array (
 							'type' => 'int',