Cheers. I'll check it again tomorrow.
To be sure, my system lost connection three times. Once for a few seconds, the other for about 2 mins, and the other about 10-15 mins. Not sure if that would have cost me significantly, but I'm getting the impression not.
On long rounds like the 3+ hour ones disconnecting for a few minutes won't matter as long as it's at the beginning of the round. Now if it's a short round or you disconnect near the end of the round then you lose out big time! But... that's how Slush's anti-pool hopping rewards system works.