Here's the official statement by 24hash team:

We use well-known MPOS software for all our pools.
For LIBERTYCOIN XLB - we get untypical error that is caused solely by LIBERTYCOIN (XLB) source code.
When we run the command Libertycoind -daemon in admin panel mysteriously disappears section wallet info, while run-payout.sh also crashes.
In this momement we not have a solution to this problem. But not we not stolen any coins from our registered users.
Maybe someone managed to get payments, other else .
The problem is in the network of LIBERTYCOIN.
So far, none of our other pools have a similar problem .
We can not solve this problem before LIBERTYCOIN fix their network .
We apologize to all who have lost their hash power for this coins.