Worth documenting imho. See Bin's comment
about needing root.
Here's what I'd add to release notes:
Since couchbase server 2.0.2 some internal directories are not world readable anymore. On multiuser systems that was a security issue. Which is now closed. It will affect people trying to run cbcollect_info under non-root accounts because cbcollect_info will be unable to see many details about couchbase server. Which was quite limited before, but since 2.0.2 it's nearly totally invisible.