[wp-trac] [WordPress Trac] #18069: Preview fails / admin bar missing on multisite installs

[WordPress Trac]

#18069: Preview fails / admin bar missing on multisite installs
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 Reporter:  multimule     |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Multisite     |    Version:  3.2
 Severity:  critical      |   Keywords:  remote login network multiple
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 Given a multisite install at example.org one may create one blog per sub-
 domain. E.g.

 * foo.example.org
 * bar.example.org
 * whatever.example.org

 Now there's the option to map additional domains to that blog (One may
 configure foo.com as primary domain to reach the blog at foo.example.org).

 Now the backend is still located at the original domain
 (http://foo.example.org/wp-admin/), but when the user _previews_ a post
 the following domain is called: http://foo.com/?p=123&preview=true

 BUT this fails with a 404 error! (as the user is logged in to
 foo.example.org, but not to foo.org)

 It'd be good to have authentication work for mapped domains too, as that
 would apparently solve the problem.

 Of course one may switch even the backend to the mapped domain, but then
 users/admins of the multisite install would have to log into each and
 every blog separately when switching between them - effectively destroying
 one of the main attractive features of a multisite install (see also:
 http://wordpress.stackexchange.com/questions/17272/remote-login-with-
 multisite-domain-mapping-still-forcing-users-to-login-to-all)

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Ticket URL: <http://core.trac.wordpress.org/ticket/18069>
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