I don't know what's causing it, but it's driving me crazy. I'm also finding that my load times for movies are totally unacceptable now.
I've used JRiver Media Center since version 10 or maybe earlier. I've religiously bought every release. When i use it stand alone on my main PC, it seems to work well. I have no complaints. But i just cannot get it to work well as a client server. The client's library wouldn't synch right, it crashes, it stops putting out audio, it's slow to load movies, subtitles aren't working right, etc. Those things don't all happen all the time - but even once or twice a week is enough that people like my parents or my wife lose confidence and don't want to use the system anymore.
I've been a software developer for 20 years, and i know it can be frustrating for a developer to hear about little problems that can't be easily reproduced. But this system just does not ever work well enough for me that i can let my wife use it herself. Guests who stay with me can't figure out why movies i tell them are available are not showing up. Something will cause MC to shut down, and then i have to drag out a keyboard to work with the computer.
My house is wired, so the network is capable. My machines are all plenty fast to be dealing with the media, and i still have sporadic problems.
I think i might have to start considering using PLEX or something else for my other machines.