I got the Securi message this morning as well, using Safari on my Mac... Seems to be working OK now...
You added a very handy "Search this thread only" option, which went away with vBulletin. Thank you! Is there a "Search this forum only" option too? If so, I don't see it.
Ahh... they moved us to a different server yesterday, which means the DNS has not updated yet on that ISP and thats why you are seeing that issue, and is also why your app isn't working.
The DNS should have updated as it was only set to 900 seconds, but sadly some ISP's don't properly update DNS.
If you were on a PC I would tell you to use a different DNS server such as 8.8.8.8 and 8.8.4.4