THe problem is probably caused by different mysql versions, which in itself has nothing to do with phpmyadmin. However, you can change the 'compatiblity mode' in which phpmyadmin exports it's files. See the dropdown box in the phpmyadmin 'export' for that.
Newer mysql versions use things like 'collations', 'charsets' and other scary words, which will confuse older versions. You should use 'mysql32' or 'mysql4', if you want to export to a server that uses an earlier version of mysql.
If you really do want to change your phpmyadmin, just download an older version from the web and unpack it in your webroot somewhere. You could use the config file from xampp, or edit the one that comes with the download. It shouldn't be too difficult.
also see >> http://community.apachefriends.org/f/viewtopic.php?t=18078