This plugin is outdated and might not be supported anymore
Details
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When you create new post type and add categories to your custom post types (for example with magic field 2), you can’t find your post when you use category or tag for select it.

This plug-in correct this problem.

Add Post-Css-class plugin
In complement of cat-post-type, Post-Css-class add the possibility to return the class “post” in function post_class to your custom post type. Some wordpress themes need this class for a correct dipslay of your custom post.

Details

Plugin code:
cat-post-type
Plugin version:
1.0.1
Outdated:
Yes
WP version:
3.3 or higher
PHP version:
or higher
Test up to WP version:
3.5.2
Total installations:
20
Last updated:
2013-05-03
Rating:
Times rated:
8
custom-post-tags-categories