This is for 0.16 and svn 3736, current as of April 24 '09.
The ruby symbol parser seems to fail to detect certain do...end constructs, like
File.open("somefile","r") do |infile|
The "end" statement is detected, but not the preceding "do", making the organization of the symbols in the tree browser inaccurate. Yes, I know ruby syntax is awful :-(
See attached sample file.