OK, I am really liking my catalyst except for the fact is squeaks at an annoyingly high pitch when I walk - mostly from behind my hips at the hip belt where it meets the framesheet. I've only used the pack a max 3 weeks out total (got it back in late March) and it will squeak even if not damp. I have to do all kinds of adjusting straps etc to cut down the noise that at times can even drown out my footsteps. Really annoying as I hike. Anyone else have this issue? I plan to ask them at ULA about this.