It seems that this bug is known and is said to be fixed on the phpmyadmin bug tracking system :
[ 1547604 ] export/sql.php not working here : http://sourceforge.net/tracker/index.php?func=detail&aid=1547604&group_id=23067&atid=377408 -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]