Originally Posted by Jim Lester
Or rather both Bluefire and ADE use RMSDK. ADE 1.7 uses a really old version of RMSDK (9.1 IIRC). Bluefire and ADE 1.8/2.0 user a much later version (9.3.x).
I think Adobe botched things big time with the RMSDK. They should have made it mandatory for anyone using the RMDSK to keep it updated. Because of this botch, we'll have old versions floating around for a long time and ePub eBooks may have to stay compatible to the old versions because of this.