I don't know about the caps plugins, however, i had a question on avw.lv2. I installed those plugin's to work through a tutorial on synth building in ingen (you may have done the tutorial). That works fine in ingen. However, if i have that lv2 plugin set installed, qtractor will not start for me.. if i uninstall the set, qtractor starts fine. have you seen this behavior? Qtractor doesnt segment fault or anything.. it just hangs. I tried with both 0.5.6 and current svn head. Have you seen this?