I've read that in the next release will be possible to load 2 facebook libraries, is that right?

No, you can't load 2 of the same library. We've renamed the PHP class so it won't conflict, but the JS library WILL which is externally provided by Facebook and there's nothing we can do about this.

Any solution available for my conflict?

Remove either/or or update either/or to use either/or library. More then likely FBC won't work with any library then its own as it would de-authorize the applications configuration (responsible for handling the entire connection process). Actually more of a fault of the JS library then anything as it can't handle multiple instances of its self.