[linux-audio-user] Jamin/Ardour export bug and question

Bug (?) : I have a 24 bit stereo track in Ardour connected to Jamin and returned to another stero track. When the mastering is done I export the mastered track to 16 bit wav. Everything works, but after Ardour has exported 100% (and before closing the export screen) it's dead for 15-45 secs. During this, 'top' shows 85-95% CPU usage for Jamin. If I close Jamin before exporting, Ardour responds directly. Question: I have an Ardour session with 17 tracks that have EQ, compression and the occasional effect pre-fader, a phaser on a pre-fader send bus and a stereo reverb pre-fader on the master bus. If I route the master bus to Jamin and back in on a stereo track the Jamin output sounds fine, but the stereo track ends up with none of the effects. Is it impossible to do a multitrack mastering with the effects intact or am I doing something wrong? HW/SW specs: AMD AthlonXP 1200+, 512MB RAM, SB Live!, kernel 2.6.12 rlimits, jack in RT mode. Ardour CVS from Aug 31 and Jamin CVS from mid/end July. Regards, Peder