[wp-trac] [WordPress Trac] #25023: WordPress 3.6 deleting data on custom post meta

[WordPress Trac]

#25023: WordPress 3.6 deleting data on custom post meta
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 Reporter:  cdwharton       |       Owner:
     Type:  defect (bug)    |      Status:  new
 Priority:  normal          |   Milestone:  3.6.1
Component:  Administration  |     Version:  3.6
 Severity:  critical        |  Resolution:
 Keywords:                  |
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Comment (by SergeyBiryukov):

 To summarize, you need four prerequisites to reproduce the issue:
 1. WordPress 3.5.x or earlier.
 2. A post or page where the content is different from the latest revision.
 3. A custom meta value for that post.
 4. A custom code that fires on `save_post` and updates the meta value
 without checking if it actually was a `$_POST` request.

 Then the steps to reproduce would be:

 1. Upgrade to 3.6.
 2. Go to the Edit screen for that post. The meta value will be gone.

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Ticket URL: <http://core.trac.wordpress.org/ticket/25023#comment:36>
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