OSError in one of the threads of Bottle framework, while running the dev server

When I run bottle development server, I notice some warning showing up. Can any one figure it out what exactly is the problem?

Exception in thread Thread-1:
Tracebac开发者_开发百科k (most recent call last):
 File "/usr/lib/python2.6/threading.py", line 525, in __bootstrap_inner
   self.run()
 File "/usr/local/lib/python2.6/dist-packages/bottle-0.8.1-py2.6.egg/bottle.py", line 1406, in run
   if path: files[path] = mtime(path)
 File "/usr/local/lib/python2.6/dist-packages/bottle-0.8.1-py2.6.egg/bottle.py", line 1401, in <lambda>
   mtime = lambda path: os.stat(path).st_mtime
OSError: [Errno 20] Not a directory: '/usr/local/lib/python2.6/dist-packages/github2-0.1.2-py2.6.egg/github2/issues.py'

This is a bug in bottle (solved in 0.8.2). The reloading feature checks for modified module files and is confused by paths that point into egg archives. Update to 0.8.2 or disable the reloading-feature to solve this.