Forum OpenACS Development: Is there a development version of .LRN compatible with OpenACS 5.1?

I wanted to checkout the development version of .LRN to test on openacs 5.1, but I can't seem to find a combination that will install sucessfully.

i checked out acs-core with the oacs-5-1 tag and dotlrn-all from HEAD.

Is there a better set of tags to use?