The DNS is not fully established. We changed servers at the time of the software upgrade.
Below is a link to tell you how to flush your DNS cache. That will clear the old IP in your computer and will allow this new one to establish itself.
Otherwise, this may go on for another day or two as the various connections get use to the new IP. But the server does have security software to keep bad things off the forum.
Another problem I've come across is that some punctuation doesn't display correctly. In a number of stories in the library, quotation marks show up as “ (opening) and ” (closing) and apostrophes as ’. Not all of them, but a number.