Warnings on fresh installation

[lindapowers]

Warning: Invalid argument supplied for foreach() in .../www/components/com_virtuemart/router.php on line 709 shown in cart, best sales module etc.

Also noticed "add to cart" is not working on beez template, however it does on a custom one I had. This was a fresh installation just to test VM.

Gave a lot of warnings too after installing sample data, forgot to copy them though

This was on Joomla 1.5.23