Logic = master / Reaper = slave. Not *really* working?

During the last 3 days I was working on a project with lots of Midi tracks and I decided to have Logic 6/7 sync Reaper via MTC. So far so good - it *does* work, BUT: every day the offset I have to set in Reaper is different! Could anyone explain me why this happens? btw. out of question is to slave Logic to Reaper cos this would never ever work. Logic simply refuses to sync properly to any other clock than its own, no matter what program/hardware or Logic version I use...

come on guys

Since 3.13pre X it works! Hallelujah!!!!!!!!!!!!!!!!!!!!!!!!!! Praise the Lord!!!!!!!