Same here, didn't notice any significant lost in profit from mining with icemining.
that's what it is

it means they selectively raped some miners, taking away from them for 2 hours 90% HR
No its connectivity issues.
And looks like icemining.ca is having problem again ( right now )
I just watched the output from one of my miners, and it mentioned problems connecting to the pool.
I know there are some major DNS upgrades going on the internet today. So that might have something to do with it.
Pool Stats also seem to indicate an issue, as the hashrate just dropped by almost 50% on the entire pool.
Miner counts also dropped by a few hundred.