Loving seeing Scout out in the 'real world' now. It's proving to be a damn fine product for finding performance issues I didn't know I had (pieces of code that run that I didn't really know were running).
While I'm tracing my app, I notice that there are sometimes periods where the coloured bars go a faint grey rather than being colour coded. If I highlight them I still seem to get all the normal information about the code run during that section, but I'm intrigued what it means when they go grey?