If you're trying to be PHP 5.1.6 compatible, memory_get_peak_usage() throws an error:
Fatal error: Call to undefined function memory_get_peak_usage() in /var/www/html/imd-test/administrator/components/com_virtuemart/helpers/config.php on line 161
It's only used for debugging so I've commented it out. Is this worth "fixing"?
http://forum.virtuemart.net/index.php?topic=94067
Thanks...should have searched more first. :-[