So I installed the 10.3 pre-release today. When I export a cadastral xml from one geodatabase and attempt to append it to another parcel fabric, I get an error that the datum doesn't match. Both feature datasets are using the same coordinate system. I found out by comparing the xml created after the upgade to 10.3 and one created before - that the esrispatialreference tag for the xml file from the 10.3 export is missing the vertical coordinate system parameter at the end of the line.
Is this a bug?
I fixed it by pasting the missing info from an older xml.
My tech support footprint has become much bigger as of late.