Re: [100 TH] Slush's Pool (mining.bitcoin.cz); TX FEES + UserDiff; ASIC tested
I have an unconfirmed payment from 11/7 and a negative balance with no double payment visible.
On the Slush web site https://mining.bitcoin.cz/accounts/profile/ it says " Quick updates
08.11.2013
Some recent payouts didn't go thru bitcoin network because of unsatisfied transaction fees. We're finding a soluton and all payouts will be processed soon"
Hopefully they will fix this soon, or try to contact Slush support email or the Live Support.
In my case the double payments were not consecutive. looking at my wallet transactions, stats (I copy and keep my Slush stats) and the payout history I managed to figure it out more or less...
Newcomers to slush pool: slush's pool IS the shit. Slush's pool is a small operation. Sometimes weird stuff happens for a while, most likely because the genius is updating his site. It ALWAYS corrects itself (at least 99% of the time). Just trust the slush.
My take on Slush's Pool since I have been mining on slush since January of 2013 is
1. Very Little down times (Great pool connection)
2. Payment is a little funky sometimes but corrected with given time, and for the most part every payment is right.
3. Lucky days is when you have a great day, unlucky days
but it averages out with the lucky days. 
4. Forum thread for this pool is a like a family, everyone comes here to talk, complain and resolve.
I have high confidence Slush will fix it.
but if people are told to sit down and shut up Slush has no reason to look closer at a possible oddity.
now back to staring at my blades mining at 7gh/s for no reason at all...