have been using the YAPB for years. Updated now to latest WordPress version, and it doesn't work anymore. But it seemed to me that it had problems already before. It creates the cache file in wp-content/uploads/yapb_cache, but they are zero bytes. Not sure if the permissions are ok - 750. But that's the default, and I can't change them.
Anyone has a tip what this could be? Thanks a lot for any hints!