Simple Tags breaks tag-based post queries in WP trunk

I ran into the following issue with Simple Tags on WordPress trunk

https://core.trac.www.ads-software.com/ticket/12891#comment:73

Enabling Simple Tags on WordPress trunk causes queries of the form get_posts(‘tag=something’) return all posts rather than just those tagged “something”.

Though this problem was introduced by a recent change to WordPress, it seems like Simple Tags is causing the problem by overwriting the value of ‘query_var’ with ” in $GLOBALS[‘wp_taxonomies’]. The following diff shows what $GLOBALS[‘wp_taxonomies’] looks like on a fresh WP trunk installation before and after enabling Simple Tags:

https://gist.github.com/659120

It seems like Simple Tags should at least ensure that these parameters are set to reasonable values, though I don’t understand why it is necessary to call register_taxonomy() at all, since taxonomy.php already does this.

Thanks for your consideration,
Dave

https://www.ads-software.com/extend/plugins/simple-tags/