diff --git a/Classes/PHPExcel/Worksheet.php b/Classes/PHPExcel/Worksheet.php
index 2f72301f..b768dac6 100644
--- a/Classes/PHPExcel/Worksheet.php
+++ b/Classes/PHPExcel/Worksheet.php
@@ -643,9 +643,9 @@ class PHPExcel_Worksheet implements PHPExcel_IComparable
     public function setTitle($pValue = 'Worksheet')
     {
     	// Is this a 'rename' or not?
-    	if ($this->getTitle() == $pValue) {
-    		return;
-    	}
+		if ($this->getTitle() == $pValue) {
+			return;
+		}
 
 		// Syntax check
 		self::_checkSheetTitle($pValue);
@@ -657,9 +657,21 @@ class PHPExcel_Worksheet implements PHPExcel_IComparable
 		if ($this->getParent()->getSheetByName($pValue)) {
 			// Use name, but append with lowest possible integer
 
+			if (PHPExcel_Shared_String::CountCharacters($pValue) > 29) {
+				$pValue = PHPExcel_Shared_String::Substring($pValue,0,29);
+			}
 			$i = 1;
 			while ($this->getParent()->getSheetByName($pValue . ' ' . $i)) {
 				++$i;
+				if ($i == 10) {
+					if (PHPExcel_Shared_String::CountCharacters($pValue) > 28) {
+						$pValue = PHPExcel_Shared_String::Substring($pValue,0,28);
+					}
+				} elseif ($i == 100) {
+					if (PHPExcel_Shared_String::CountCharacters($pValue) > 27) {
+						$pValue = PHPExcel_Shared_String::Substring($pValue,0,27);
+					}
+				}
 			}
 
 			$altTitle = $pValue . ' ' . $i;
diff --git a/changelog.txt b/changelog.txt
index 05adfc17..a66e02c1 100644
--- a/changelog.txt
+++ b/changelog.txt
@@ -41,7 +41,8 @@ Fixed in SVN:
 - Bugfix:   (MBaker) Workitem 14223 - Advanced Value Binder Not Working?
 - Bugfix:   (MBaker) Workitem 14226 - unassigned object variable in PHPExcel->removeCellXfByIndex
 - Bugfix:   (MBaker) Workitem 14236 - problem with getting cell values from another worksheet... (if cell doesn't exist)
-- Bugfix:   (MBaker) Workitem 14260 & 14233 - Setting cell values to one char strings & Trouble reading one character string (thanks gorfou)
+- Bugfix:   (MBaker) Workitems 14260 & 14233 - Setting cell values to one char strings & Trouble reading one character string (thanks gorfou)
+- Bugfix:   (MBaker) Workitem 14256 - Worksheet title exception when duplicate worksheet is being renamed but exceeds the 31 character limit
 
 
 2010-08-26 (v1.7.4):