What about Steve's comment from 2012-03-12?: "There is already work under way for 5.0 to fix the underlying limitation here. I can't commit resources to this for any earlier releases. If someone wants to work on support for this against 4.1 (currently master atm) I'd be willing to look at integrating pull requests which address this. Other than that, this will have to wait for 5.0."

Is there work under way for 5.0, or has it already been fixed respectively?