Problems with Jack and my USB mic

view story

https://bbs.archlinux.org – My current settings on Jack are relatively standard, except for one thing - I have specified different input and output devices than default. Using such a setup stops Jack from starting up at all, and is very annoying - I would love to be able to use Jack for what it is supposed to be used for. Everything is the latest stable build out of the repositories via pacman, any help would be appreciated. (HowTos)