Paypal Express Checkout not send options

Hi

I am hoping someone will be able to help me out if they have had this problem before.

I have set up PayPal express checkout and I thought it was working fine until I have noticed it is not saving the options values when complete.

The order is created but the option value is set as blank. (the option name is saved as well as all the other fields (including product_option_value_id)

When I go through the process
> In the basket the option is: Size: Large
> On the paypal website: Item description: Size:Large
> on payment/pp_express/expressConfirm: Size:

I am not sure what the problem is as all the other fields are saved.

Any help will be very appreciated.

Thank You in advance.