Loosing cookie data - http to https switch

[eluser]Raymondddd[/eluser]
Hi guys,

I've some troubles with cookie data. Our customers can add products to their cart in a http environment. When _some_ customers switch to the cart (https), the cart is empty.

The cart is retrieved using a hash (in cookie) and IP.

I think 99/100 customers don't have problems to reach the cart.

Anyone experience?

Regards,

Raymond