xBlend next beta2: is Available !
1) 32bit float point image processing  (may be ACES compatible?)
2) precisely adjusted blend modes to match references (it looks like in ps,pr,bcc,davinci)
3) removed render artifacts for some modes (errors in maths)
4) osx 10.7+ support (don't know what for, but nice - maybe for MC6+?)
5) made some base code for much more modes.... (even if you don't need them)
6) added fancy modern "Bypass" checkbox

Download at http://djfio.com/mdv