after the latest galaxy update I've experienced the following error while trying to start the server.

galaxy.eggs DEBUG 2014-06-04 14:34:56,027 Fetched http://eggs.galaxyproject.org/bioblend/bioblend-0.4.2-py2.7.egg
galaxy.eggs ERROR 2014-06-04 14:34:56,047 One of Galaxy's managed eggs depends on something which is missing, this is almost certainly a bug in t
he egg distribution.
galaxy.eggs ERROR 2014-06-04 14:34:56,047 Dependency "bioblend" requires "mock"
Traceback (most recent call last):
  File "./scripts/paster.py", line 33, in <module>
    serve.run()
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/serve.py", line 1049, in run
    invoke(command, command_name, options, args[1:])
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util
/pastescript/serve.py", line 1055, in invoke
    exit_code = runner.run(args)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/serve.py", line 220, in run
    result = self.command()
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/serve.py", line 643, in command
    app = loadapp( app_spec, name=app_name, relative_to=base, global_conf=vars)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/loadwsgi.py", line 350, in loadapp
    return loadobj(APP, uri, name=name, **kw)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/loadwsgi.py", line 375, in loadobj
    return context.create()
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/loadwsgi.py", line 813, in create
    return self.object_type.invoke(self)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/loadwsgi.py", line 249, in invoke
    return fix_call(context.object, context.global_conf, **context.local_conf)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/pastescript/loadwsgi.py", line 97, in fix_call
    val = callable(*args, **kw)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/webapps/galaxy/buildapp.py", line 49, in app_factory
    webapp.add_ui_controllers( 'galaxy.webapps.galaxy.controllers', app )
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/web/framework/__init__.py", line 441, in add_ui_controllers
    module = import_module( module_name )
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/util/backports/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/webapps/galaxy/controllers/cloudlaunch.py", line 20, in <module>
    eggs.require('bioblend')
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/eggs/__init__.py", line 409, in require
    return c[req.project_name].require()
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/eggs/__init__.py", line 237, in require
    dists = self.resolve()
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/galaxy/eggs/__init__.py", line 168, in resolve
    dists = pkg_resources.working_set.resolve( ( self.distribution.as_requirement(), ), env, self.fetch )
  File "/steno-internal/projects/galaxy-test/galaxy-dist/lib/pkg_resources.py", line 569, in resolve
    raise VersionConflict(dist,req) # XXX put more info here
pkg_resources.VersionConflict: (bioblend 0.4.2 (/steno-internal/projects/galaxy-test/galaxy-dist/eggs/bioblend-0.4.2-py2.7.egg), Requirement.parse('mock'))