I reported the FOP problem when it started - on Tuesday. I'm running 817.3 still. It occurs with some of my accounts and not others, and only seems to be related to populating the dropdown menu to create a ticker in underlying mode. I'd be curious which server you show you are connected/re-directed to (look in log.txt in your install directory). It affects my accounts that connect (are re-directed) to gw4 and gw5. There are two alternatives: Option chain pages still work. Also, symbol mode still works (choose View->Symbol Mode). The symbol for an April04 1050 call is "ESJ4 C1050#GLOBEX".
I'm also down since 10:21, interactivebrokers realiability is turning to crap. Plus there have been problems upgrading/installing the latest versions of their software..