Lots of pending Orders-won't go past redirecting to paypal

[samlf3rd]

Hello,
Joomla 3.4.1, and VM 3.0.8
I am having a very weird problem. Half of our orders go through and the other half the people never get to the payment page. We have the standard PayPal and PayPal AdvancedSSC. They both do this.
I only have this error in my error.php:

Code Select Expand

PHP Warning:  Invalid argument supplied for foreach() in /home/myserver/public_html/mysite/components/com_virtuemart/controllers/cart.php on line 423

Help!

[GJC Web Design]

That "warning" is nothing

have you switched on the paypal debugging and run a few orders?