I generally have difficulty treating defects (orphan/escape defects) in our backlog, iterations, etc. similarly to user stories in Rally. One particular problem I have is I am unable to attach these "orphan" or "escape" defects in our backlog directly to a feature in the portfolio. We are trying to avoid nesting too much, and Rally forces me to attach the defects to a placeholder user story, and then to a feature. I would like to see this changed.