Bittrex should now be back up. And, for reference, the network never became unsafe. Safemode caused mining to stop for some pools, causing extremely long block times and large difficulty swings. There was never another fork made or anything like that, and never a risk of a double spend or anything like that. And everything should be good now. The network has progressed enough after the fork that there should be no more problems and no need for a wallet update.

We will be writing up a full analysis and report on what happened, but a good technical overview has been reported to the Dogecoin developers, which is what Fractalcoin was forked from. You can see that bug report here.