since I upgraded wordpress and WPEC I am having loads of problems on checkout. Sometimes, the user clicks the calculate checkout button (the rest of the page beneath - address, shipping options etc- isn't loaded) and the page just refreshes with no change.
I unchecked allow shipping then re checked it in WPEC store settings and this seemed to fix this issue.
Now, if it's a new user, enter all details on checkout page then click to make purchase (which should send them to paypal) and the checkout page just refreshes in the state from my first paragraph above.
Can anyone help with this? I have put the site in maintenance mode for now.