Block checked, zpool and exchanges seems to be on the wrong fork - https://chainz.cryptoid.info/dash/search.dws?q=523412 - the wrong hash. The problem is that all exchanges is on the wrong fork, so it is very dangerous to make transactions right now - I tried to send 0.01 to c-cex, btce,yobit,bittrex - no one see my transactions, but if i check my transaction with right one explorer https://explorer.dashninja.pl/chain/Dash - transactions confirmed.
Yes, absolutely. The faster they get on the right chain the better, we are sending notifications to all exchanges.
There's also two new checkpoints, that signal the correct chain to hop on. We'll push out an update in a few hours, in the mean time, if you're running from source feel free to update (the most important nodes will be running source, so that should fix everything anyway).