[PD] external glitch with jack not with alsa why?

[patrick]

compiled from svn : pd 0.42.5
i have also tried auto-build 0.42.5

i still have the problem with the external (glitchy under jack). but 
netsend / netreceive is working when using something like:

[pack 0 0 0 0 0 0 0 0 0 0 0 0 0]
|
[send $1 $2 $3 ....]
|
[netsend]

still i would like to know if it's possible to fix my problem with the 
external.

pat