In the midst of making some new 126.96.36.199 builds - to catch up with some security patches - I tried to build the latest 188.8.131.52 source...
Holy cow! I had tried building this before and couldn't get it to finish without erroring out. However - this time - it built like a charm.
I haven't tried out all of the advanced functions yet - like the new spell checker, etc. - so use it at your own risk.
But - based on my initial testing, it seems just fine.