Replace the default taxonomy boxes with custom metabox that uses checkbox limiting each post to single term in that taxonomy..
plugin options page allows the user can select which taxonomies she'd like to switch to using the custom checkbox style metabox..
Originally based on the the class by Stephen Harris.
The settings page where you determine which taxonomies will get checkbox..
This is what the metabox will look like on the editor screen...
Upload the folder to the wp-content plugins directory.
Activate the plugin through 'Plugins WordPress.
Go to Settings>Checkbox for Taxonomies and use the checkboxes to indicate which taxonomies you'd like to use checkbox...
Changed tag to check box, but could check one box like radio button...
Browse the code, check out SVN repository, or subscribe to the development log by RSS...
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