After booting, indicators and launcher can't be pulled in over Greeter

I'm assuming you have a passcode or passphrase set? If so, this is intentional behavior, requested by design and landed in https://code.launchpad.net/~mterry/unity8/lockscreen-nits/+merge/228683

No passcode... Also, as the description states, this only happens on first boot. once swiping the greeter away it recovers and works fine.

This bug was fixed in the package unity8 - 8.00+14.10.20140822-0ubuntu1

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unity8 (8.00+14.10.20140822-0ubuntu1) utopic; urgency=low

  [ Albert Astals ]
  * More stable dash overview tests
  * PreviewExpandable: "widgets" is a model, not an array

  [ Alberto Aguirre ]
  * Proxy inactivity timeout values from gsettings into Unity.Screen
    (LP: #1230345)

  [ Gerry Boland ]
  * Cancel open PAM interactions on shutdown - fixes hang on logout on
    desktop (LP: #1353041)

  [ Diego Sarmentero ]
  * Show progress bar on payment button click The payment process has a
    small delay before the UI comes up which might cause confusion. Show
    a progress bar with unknown value to indicate activity. (LP:
    #1354139)

  [ Mirco Müller ]
  * Made notification qml-test pass again by using Component.onCompleted
    instead of onOpacityChanged for the time being.

  [ Michael Zanetti ]
  * Implement new lockscreen designs

  [ Michael Terry ]
  * Show the SIM unlock dialog immediately after booting, and enable its
    emergency call button.
  * Always keep indicator/launcher locked state in sync with whether the
    user is authenticated. (LP:# 1357230) (LP: #1357230)
  * Allow logging into a desktop or tablet session again, by properly
    dismissing old PAM conversations. (LP: #1350878) In a desktop or
    tablet, we were accidentally starting two PAM conversations in
    sequence on startup. Which is a small bug; it shouldn't normally be
    a problem, since each new PAM conversation should kill the old
    one.But the way we were killing the old one was subject to a thread
    race condition. See, a PAM conversation thread won't exit until all
    its prompts are answered. And what we do when we kill a PAM
    conversation is to answer all prompts with empty strings.But it's
    possible that when we want to kill a PAM conversation that it hasn't
    actually gotten to the point of prompting us yet. And when those
    prompts do come through, we were treating them as prompts for the
    new PAM conversation.So I've changed the PAM conversation logic to
    include a pam_handle and compare the handle with the current handle
    when being prompted. If it's an old handle, we just dismiss the
    prompt with an empty string response.Oh, and I fixed the bug that
    caused two prompts on startup in the first place. (But we still need
    the above logic anyway, for when you switch users quickly.) (LP:
    #1350878)

  [ Martin Pitt ]
  * Mark for using language packs.
 -- Ubuntu daily release <email address hidden> Fri, 22 Aug 2014 09:29:41 +0000