I am on a thread on facebook about this same problem. There are govs of people having the same issue. We did find a kind of work around tho. On Safari browser, with facebook...you can hold down on the like..when you get the popup, choose open and it will like it. Do the same for share. The only way you can comment tho, is by opening it up in a new tab, then you can comment, like and share all at once! These work arounds do not work in Chrome or Mercury browsers tho. Have not tried this on Dolphin. And the concensus with the people on facebook is that it seems to have all started on 12/11/12...when the new little See what happened to you in 2012 box appeared on your wall...which when you click to open it, there is a blank white screen.