Index: trunk/outerbridge-humancaptcha.php
===================================================================
--- trunk/outerbridge-humancaptcha.php	(revision 2431647)
+++ trunk/outerbridge-humancaptcha.php	(working copy)
@@ -186,7 +186,11 @@
 			$selected = $this->obr_select_question();
 			$question = $selected['question'];
 			$answer = $selected['answer'];
+			if (!session_id()){
+				session_start();
+			}
 			$_SESSION['obr_answer'] = md5(strtolower(trim($answer)));
+			session_write_close();
 			// use the comment-form-email class as it works better with 2011
 			$outputfield = '<p class="comment-form-email"><label for="answer">' . stripslashes( $question ) . ' <span class="required">*</span></label><input id="answer" name="answer" size="30" type="text" aria-required=\'true\' /></p>';
 			$fields['obr_hlc'] = $outputfield;
@@ -217,7 +221,11 @@
 		$selected = $this->obr_select_question();
 		$question = $selected[ 'question' ];
 		$answer = $selected[ 'answer' ];
+		if (!session_id()){
+			session_start();
+		}
 		$_SESSION[ 'obr_answer' ] = md5( strtolower( trim( $answer ) ) );
+		session_write_close();
 		$outputfield = '<p><label for="answer">' . stripslashes( $question ) . '</label><br /><input type="text" name="answer" id="answer" class="input" value="" size="25" tabindex="20" /></p>';
 		echo $outputfield;
 		$fields[ 'obr_hlc' ] = $outputfield;
@@ -243,14 +251,15 @@
 	}
 
 	function obr_register_validate_answer($errors, $sanitized_user_login, $user_email){
-		if (!session_id()){
-			session_start();
-		}
 		if ((!isset($_POST['answer'])) || ($_POST['answer'] == '')){
 			$errors->add('obr_error', __('Error: please fill the required field (humancaptcha).', 'humancaptcha'));
 		} else {
 			$user_answer = md5(strtolower(trim($_POST['answer'])));
+			if (!session_id()){
+				session_start();
+			}
 			$obr_answer = strtolower(trim($_SESSION['obr_answer']));
+			session_write_close();
 			if ($user_answer != $obr_answer){
 				$errors->add('obr_error', __('Error: your answer to the humancaptcha question is incorrect.', 'humancaptcha'));
 			}
@@ -266,14 +275,15 @@
 	}
 	
 	function obr_validate_answer(){
-		if (!session_id()){
-			session_start();
-		}
 		if ((!isset($_POST['answer'])) || ($_POST['answer'] == '')){
 			wp_die(__('Error: please fill the required field (humancaptcha).', 'humancaptcha'));
 		}
 		$user_answer = md5(strtolower(trim($_POST['answer'])));
+		if (!session_id()){
+			session_start();
+		}
 		$obr_answer = strtolower(trim($_SESSION['obr_answer']));
+		session_write_close();
 		if ($user_answer != $obr_answer){
 			wp_die(__('Error: your answer to the humancaptcha question is incorrect.  Use your browser\'s back button to try again.', 'humancaptcha'));
 		}
@@ -483,9 +493,6 @@
 	}
 
 	function obr_init(){
-		if (!session_id()){
-			session_start();
-		}
 		global $comments_on, $register_on, $login_on; 
 		// see obr_insert_default_admin_data for which setting is which...
 		$comments_on = $this->obr_get_setting_value(1);