EDIT: the stale thing is weird. I get amazing stale count, but suddenly I get like a burst of stales, for example this just happened:
It happens in random cards and only in this pool.
Except for this "bursts" of stales the stale count is amazing.
I confirm that, I have the same problem.
I just got done looking over our logs, and I do see a lot of stale shares coming from your works.
For example:
13 Jul 23:39:29 - info: getwork: stale share from XXXX
13 Jul 23:39:31 - info: getwork: stale share from XXXX
13 Jul 23:39:32 - info: getwork: stale share from XXXX
If you could tell me what miner you use, and what version you have that would be helpful. From our longpool logs it appears that you only have 2 open longpool connections, but four miners. Also, this rapid stales, like the above, indicates that either you don't have a longpool connection open or that we were not successful in getting you the LP getwork soon enough.
Also, on issues like this, for everyone I'd be curious to know what your ping response time to pool.bitp.it is. Network latence will play a small roll, and I figured it probably best to get as much info as possible

Thanks all!