Today I ran the migration generator on a table using the Versionable template. It generated a bad name for the foreign key because the builder doesn't handle the local key identifier as an array. The result is foreign key names containing "Array", like this:

$this->createForeignKey('paragraph_versions', array(
  'local' => array(0 => 'id'),
  'foreign' => array(0 => 'id'),
  'foreignTable' => 'paragraphs',
  'onUpdate' => 'CASCADE',
  'onDelete' => 'CASCADE',
  'name' => 'paragraph_versions_Array'
));

I've attached a patch which addresses the issue.