[wp-trac] [WordPress Trac] #33761: Admin menu layout is broken in 4.3

[WordPress Trac]

#33761: Admin menu layout is broken in 4.3
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 Reporter:  joel_birch          |      Owner:
     Type:  defect (bug)        |     Status:  new
 Priority:  normal              |  Milestone:  Awaiting Review
Component:  General             |    Version:  4.3
 Severity:  normal              |   Keywords:
  Focuses:  ui, administration  |
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 Using the latest version of WordPress (4.3), the admin menu layout is
 broken as per the screenshot attached and items appear/disappear on hover.
 The problem occurs even with all plugins deactivated and using the default
 theme.

 This is affecting every website that I update to 4.3. Reproduced on
 multiple versions of PHP from 5.2.17 to 5.4.34. Also occurs on WP Engine's
 environment, which is likely to be well updated.

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Ticket URL: <https://core.trac.wordpress.org/ticket/33761>
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