Hi FreeTrade,
Sorry for scaring you there, but it seems as if that was a one time problem that probably occured because I restarted the new version too soon after closing the old miner.
I'm happy to report that after a restart both the 6-core and 4-core machine survived the night and are still running

Looks like you finally nailed it. Great job.
I'm glad it has been helpful for you. Now might be a good time to ask you to offer some voting support to community projects. As far as I can see, you have about 18,000 coins which are supporting your grant, MVTEoEoHX4XhRkJnkGVLKDYhHG4MbJDVCT, but the surplus, about 5000 are being wasted because your other grants don't have enough support.
You can add preferences in 4,5,6,7 positions - these don't harm the prospects of your higher preferences, but when your higher preferences are elected or eliminated, the surplus can flow to community grants rather than being wasted as they are at present. Community grants help to increase the value of your holdings. It's both the generous and rational thing to do.
Here's MCF's recommended preferences - you'll need to amend the amounts to control where they appear on your list of prefs -
MCF Foundation
- Send 0.00000010 to MVTEoEoXmYzFydRfg5uNJRewt9tZ329fAN
MCF Foundation
- Send 0.00000011 to MVTEoEotER3e9NfAMPi1c1E68h5bthH4K4
MCF Foundation
- Send 0.00000012 to MVTEoEoPjXcay3aJU1uZCsipX7pf9xryW4
FreeTrade (Chief Developer and MCF Administrator)
- Send 0.00000020 to MVTEoEo5LgYAMVh95oBBfGPj2eCDzkuJC3
21st Century Money (Network and Client Support)
- Send 0.00000030 to MVTEoEomFfe7WuSEepMLsorgYzCQGBVw1z
Taturii (Giveaway)
- Send 0.00000040 to MVTEoEot8ZGKWmDi8pZS6tJMHR5ba9MnNN
EFF (held by MCF for charity)
- Send 0.00000050 to MVTEoEoJ1vP6NHHcCTTBPy4bXfejbAqV5N
Amnesty International (held by MCF for charity)
- Send 0.00000060 to MVTEoEorLyJKdtGFXfFTt3Joevk7PeRvzh