Index: t3lib/class.t3lib_userauth.php
===================================================================
--- t3lib/class.t3lib_userauth.php	(revision 4795)
+++ t3lib/class.t3lib_userauth.php	(working copy)
@@ -768,6 +768,18 @@
 						$this->session_table,
 						'ses_id=' . $GLOBALS['TYPO3_DB']->fullQuoteStr($id, $this->session_table)
 					);
+
+				// hotfix for #10205
+		if ($this->loginType == 'FE') {
+			$countSessionData = $GLOBALS['TYPO3_DB']->exec_SELECTcountRows(
+								'hash',
+								'fe_session_data',
+								'hash=' .  $GLOBALS['TYPO3_DB']->fullQuoteStr($id, 'fe_session_data')
+							);
+
+			$count = $count || $countSessionData;
+		}
+
 		return (($count ? true : false));
 	}