I've been using the latest BMB version on my Vista 32 machine for several weeks. Everything seems to work as expected. I don't have any conditional macros and less than 12 modules, most of which turn on relative to Sunrise/Sunset.
I had the BMB version working on this machine when it was running Win7 64 RC and it seemed Ok there too. One thing that I noticed was that none of the preferences would stick. After I did a clean install of Vista 32, things stayed the same.
Today I tried setting the AHP executable to run as in XP SP2 and setting the executable to Run As Administrator and it appears that preferences now stick. I don't know whether this version is good, bad, or indifferent, but if DST is really hardcoded in the CM15, then this is the only version I care to use as we don't have DST here.