jack/pulseaudio problems

[breek]

(well, just to explain, ricman is my very old nickname)

i'm having problems with default settings in current iso:

- jack realtime + pulseaudio = lots of xruns
http://ubuntuone.com/7SoO2vv4JvRXm3IO8lsHcQ

- jack no realtime + pulseaudio = lots of xruns
http://ubuntuone.com/0HHUNC3AJHupef4630q0uL

- jack realtime and pulse uninstalled = always 1 or 2 xruns
http://ubuntuone.com/79Gw6WRGU7tkR1tX1MymTM

- jack no realtime and pulse uninstalled = perfect (not even a single xrun)

is something that can be solved changing something in pulseaudio configuration?

bye