Mining on my Ubuntu PC, with an i7 I got this error after a few hours:
Floating point exception (core dumped)
with the newest update from today.
Were you pool mining, or did you have any pool settings set up at that time, and which chain were you on?
My testnet pool miner did something strange at 03:00am this morning, but my solo miners are all still running fine. I think there is one thing we need to fix in the pool before we can go live with pool mining, and that may be the same thing you report here possibly.