I'm having a problem with the jackdbus process; after some hours it starts maxing out two of my four CPU cores, which in turn causes xruns when running apps. It looks like other people have found the same problem, but no solutions.

Here's a video of this happening:
https://drive.google.com/open?id=0B2eROo5JatB4eHZweUtROTduSWc

I cut the important bits out and sped it up. It shows me starting jack via QJackCtl with a monitor of the log file and QJackCtl's messages in the first section, the processor spike in the second, an xrun in the third, and the processors returning to normal in the fourth. There's a clock at the bottom left corner of the screen.