I play music from memory but still see buffer lockups frequently - BUT ONLY when accessing my NAS drives (eg if I'm changing tags on some files while something is playing). Interestingly, only MC seems to lock these drives, no other software seems to. The entire programs freezes while it waits for the drives to become available again and then continues on as normal. I've kind of got used to it, but would prefer it didn't happen. In particular it would be nice if audio playback wasn't affected because, as noted, I play from memory rather than streaming from the drive so the data is already available to MC and doesn't require drives...