(XMR) Curious version... after 5.5.4 works fine, I get now something like "card X crashed - will be disabled" for every of my four cards. So hashrate = 0.0, no more useable with my RIG.

Did you try to reboot? Furthermore we can't fix any bug with ZERO information.
Just done a reboot, changes nothing. A bit more infos:
Win 7/64 RIG, 1x R9 290x, 3x R9 Nano, Crimson 16.7.3
Works absolute smoothly for weeks with Claymore 9.6/.7 and SGminer 5.5.4.
5.5.5 screenshot
