I too am having that same problem on my Liberty with the Shakey Hunter. Mine is tied into the cable slide, and I think that has a effect! I had my bow set-up and shooting great for almost a month, without any fletch contact at all, but when shooting today, I noticed the same thing. I am using duravanes and when shooting cock vane out, the bottom vane will "wrinkle" after the shot!

This week, I am gonna serve the TT into the down buss cable then get it tuned up!