Back in August, I mentioned the temporary state of the machine that calculates the Global and Country Leaderboards.
This morning, the hard drives in those machines failed again. Preparations are underway to inform the manufacturer and invoke a warranty replacement of the affected hardware, and we anticipate getting this resolved by the end of the week. I will certainly update this if that changes. Also note that Per-Game and Custom Leaderboards will be unaffected by this issue.
Thanks for your patience as we work to replace this hardware.
Hopefully everything can be fixed and taken care of without any more problems.