[wp-trac] [WordPress Trac] #5277: Posts are de-categorized when upgrading to 2.3.x

[WordPress Trac]

#5277: Posts are de-categorized when upgrading to 2.3.x
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 Reporter:  dtc       |       Owner:  anonymous
     Type:  defect    |      Status:  new      
 Priority:  high      |   Milestone:  2.3.2    
Component:  General   |     Version:  2.3.1    
 Severity:  critical  |    Keywords:           
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 When upgrading WP 2.2.3 to either v2.3 or v2.3.1, most of the posts get
 de-categorized : posts that used to be in categories such as "Blog",
 "Misc", "Web/Tech" appear to be "Uncategorized" after the upgrade.

 I've run the upgrade from 2.2.3 with all plugins disabled and even tried a
 forced DB upgrade. The first time wp-admin/upgrade.php is run, the result
 page doesn't load completely. Refreshing the page outputs those errors :

 http://img87.imageshack.us/img87/3859/wpqo7.png

 There's something wrong with the upgrade script. All the categories have
 unique names. Here are the catgories in 2.2.3 :

 http://img457.imageshack.us/img457/2964/cat223pt9.png

 Here are the categories once upgraded to 2.3.1 :

 http://img457.imageshack.us/img457/3766/cat231op9.png

 The same happens with 2.3

 Running :[[BR]]
 - Apache/2.2.4[[BR]]
 - PHP 5.2.4[[BR]]
 - MySQL 5.0.45-community-nt

 Logged a support ticket here as well :
 http://wordpress.org/support/topic/140903?replies=1

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Ticket URL: <http://trac.wordpress.org/ticket/5277>
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