A few updates!
I've fixed a few bugs in CACHEBOY_PRE which will be back-ported to CACHEBOY_1.5. This is in line with my current goal of stability before features. CACHEBOY_PRE and CACHEBOY_1.5 have passed all the polygraph runs I've been throwing at them and there aren't any outstanding stability issues in the Issue tracker.
I'll roll CACHEBOY_1.6.PRE3 and CACHEBOY_1.5.2 releases in the next day or two and get those out there.