new subscriptions to pro-site with paypal fails

Hey

The last week we have had issues with new subscriptions to pro-site using paypal as gateway. I get to the confirm page on paypal, and then it returns to the blog after the payment process, but the area that confirms the payment is not there. If i stay on the page and wait for about 20 seconds and refreshes then sometimes it registers the payment.

Subscription payment works fine, and we get IPN callbacks. We have talked to paypal that so far cannot see any isues in their end.

Do you have any suggestions ?