Index: t3lib/class.t3lib_basicfilefunc.php
===================================================================
--- t3lib/class.t3lib_basicfilefunc.php	(Revision 5524)
+++ t3lib/class.t3lib_basicfilefunc.php	(Arbeitskopie)
@@ -490,8 +490,11 @@
 	 *
 	 * @param	integer		Bytes to be formated
 	 * @return	string		Formatted with M,K or    appended.
+	 * @deprecated since at least TYPO3 4.2 - Use t3lib_div::formatSize() instead
 	 */
 	function formatSize($sizeInBytes)	{
+		t3lib_div::logDeprecatedFunction();
+
 		if ($sizeInBytes>900)	{
 			if ($sizeInBytes>900000)	{	// MB
 				$val = $sizeInBytes/(1024*1024);
Index: typo3/sysext/cms/tslib/class.tslib_content.php
===================================================================
--- typo3/sysext/cms/tslib/class.tslib_content.php	(Revision 5524)
+++ typo3/sysext/cms/tslib/class.tslib_content.php	(Arbeitskopie)
@@ -3404,7 +3404,7 @@
 				if ($conf['age']){$content=$this->calcAge(time()-$content,$conf['age']);}
 
 				if ($conf['case']){$content=$this->HTMLcaseshift($content, $conf['case']);}
-				if ($conf['bytes']){$content=$this->bytes($content,$conf['bytes.']['labels']);}
+				if ($conf['bytes']){$content=t3lib_div::formatSize($content, $conf['bytes.']['labels']);}
 				if ($conf['substring']){$content=$this->substring($content,$conf['substring']);}
 				if ($conf['removeBadHTML'])	{$content = $this->removeBadHTML($content, $conf['removeBadHTML.']);}
 				if ($conf['stripHtml']){$content = strip_tags($content);}
@@ -6179,6 +6179,8 @@
 	 * @deprecated since TYPO3 3.6 - Use t3lib_div::formatSize() instead
 	 */
 	function bytes($sizeInBytes,$labels)	{
+		t3lib_div::logDeprecatedFunction();
+
 		return t3lib_div::formatSize($sizeInBytes,$labels);
 	}
 
@@ -6265,6 +6267,8 @@
 	 * @deprecated since TYPO3 3.6 - Use t3lib_div::validEmail() instead
 	 */
 	function checkEmail($email)	{
+		t3lib_div::logDeprecatedFunction();
+
 		return t3lib_div::validEmail($email);
 	}