Hi all,
I'm having the same issue with my dlink dir-879.
With firmware 1.05B05 some sites work (facebook, gmail) but others don't.
I'm using PPPOE, from ISP RCS&RDS. I'm located in Timisoara, Romania. In this part of Europe RCS&RDS is the biggest ISP provider.
Also keep in mind that because of this issue many customers are giving many negative reviews on all retail sites, regarding this product.
I don't understand how such a big brand like DLINK did not yet solved an issue with a firmware released more than 6 months ago and which affects thousands of users.