Thanks to those who reported issues with the Browse pages recently. We're aware of the issue and working on getting out a fix as quickly as possible. In the meantime, you may notice that the Browse pages are not fully updated. For the long-term we're working on making these pages update more regularly and improving their stability, since you've reported this as one of your top pieces of feedback for us. Apologies again for the inconvenience, we'll update this thread as soon as things are back-up and running.
YouTube Partner Support Team