2.0.1b error messages during browsing and sales

[bunglehaze]

I am seeing the router.php error on line 89 popping up again since I upgraded 2.0.0 > 2.0.1a > 2.0.1b and also now when you ask to return to the site after a paypal payment completion:

Fatal error: Class 'VirtueMartCart' not found in /var/www/vhosts/fishmansfrags.co.uk/httpdocs/plugins/vmpayment/paypal/paypal.php on line 333

coming from: index.php?option=com_virtuemart&view=pluginresponse&task=pluginresponsereceived&pm=2

The router php error only seems to be happening on category pages:

Notice: Undefined index: p.modified_on in /var/www/vhosts/fishmansfrags.co.uk/httpdocs/components/com_virtuemart/router.php on line 89

hope this helps

[Studio 42]

Notice: Undefined index: p.modified_on in /var/www/vhosts/fishmansfrags.co.uk/httpdocs/components/com_virtuemart/router.php on line 89

PLz try to go to virtuemart config and select the searchabele orderable fields and save it

FOr the first error we look for the plugin programer(Valerie) but i think he have solved it last days.