Hi,
I'm having the same problem, cannot click on smiles to add (and I don't know the short keys for any of them other than
and
and :( ), I can't quote people and I can't mouse highlight things in this reply box, this all started a few days ago (maybe 3 like others have said, havn't kept count)
I get a yellow triangle with an exclimation mark in it, and 'Error on page' at the bottom of my browser or 'Done, but with errors', sometimes just 'Done' but the yellow triangle still there.
I think it's IE8, not sure, probably is.