I am really sorry if I have missed the solution but I have been round and round looking for a solution to my problem.
The problem I have is this:
I have setup paypal standard payment and that appears fine as a payment method and allows a purchase to be paid for using paypal and then it returns to my site to the address below.
I created a product that costs £0.01 and carried out a trial order - returning url with payment of 0.01 and order number 12, were included in it, so it should of updated the cart

http://mysite.co.uk/index.php?route=che ... em_number=
1) On several posts it states the return address should be http://mysite.co.uk/index.php?route=checkout/success and this looks correct to me.
2) The information about the order is allso in the url and that looks fine but is it ?
3) The cart is auto-emptied after the return but nothing is showing up in the customers account about the order or anthing that an order has taken place.
4) Order is visable in missing orders in the admin
So to summerise, my site will process an order and payment using paypal standard, and return after payment is made but is not updating despite order info being in return url.
I installed 1.5.4 which on the face of it only has this issue with paypal standard, and if I have the cash on delivery module enabled, that works perfectly, and shows in the customer accounts area straight away.
I have now updated to latest version 1.5.5.1 but the problem with paypal standard still is occuring.
I am using default template with no modifications
I have enabled Debug in Paypal standard Modual - No Errors are being reported
Help really appreiated as it a real puzzler.
Regards
Mark