[wp-trac] [WordPress Trac] #16649: Custom Post Names Can not include capital letters

[WordPress Trac]

#16649: Custom Post Names Can not include capital letters
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 Reporter:  rfrankel      |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Post Types    |    Version:  3.1
 Severity:  critical      |   Keywords:  needs-patch
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 After upgrading to WP3.1 I noticed none of my custom taxonomies worked
 with my custom post type.  I have been able to figure out what is going on
 an it has to do with a custom post type being registered with a capital
 letter in its name.  I.e. (set up code removed for clarity):

 Will WORK:
 register_post_type('posttypename', $args);
 register_taxonomy( 'milestone', 'posttypename', $args );

 Will Not Work:
 register_post_type('postTypeName', $args);
 register_taxonomy( 'milestone', 'postTypeName', $args );

 I am not sure if this is by design or a bug but it has worked fine up
 until 3.1.

 This is my first bug report so hopefully I haven't made an a** of myself.

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Ticket URL: <http://core.trac.wordpress.org/ticket/16649>
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