mbleigh/acts-as-taggable-on — comment on commit b449a360bf31aad686581e39e5f6c736f811aa8c
File: lib/acts_as_taggable_on/tag.rb line 71
By yury:

``` ruby
1.9.3p0 :007 > "крутой тэг становится пустым".gsub(/[^a-zA-Z0-9]/, '')
=> ""
```

Non ASCII tag names become empty strings, and when we use chained tagged_with we got collisions on table aliases:

``` ruby
User.tagged_with('круто', :on => :tags).tagged_with(['не очень'], :on => :skills).all #Mysql2::Error: Not unique table/alias
```