doctrine/mongodb-odm — comment on commit dd10565b70e2a82a302264603a6b909eebc49b29
File:  line 0
By jmikola:

This breaks support for [Multikey](http://www.mongodb.org/display/DOCS/Multikeys) indexes on fields within an array of embedded objects. For instance:

``` json
{ tags: [ { name: 'foo', weight: 1 }, { name: 'bar', weight: 2 } ] }
```

It's no longer possible to apply an index to `tags.name`.