An escrow build is one that’s final until proven otherwise. In this case, we think WiX v3.5 is ready to go. You can help prove otherwise: Download it, try it out, and file bugs if you find problems. As Rob points out, not all bugs are created equal; a bug has to be severe enough to justify resetting escrow–a four-to-six week delay in the final v3.5 release. WiX v3.6 is still in active development, so bugs that don’t get fixed in v3.5 could still get fixed there.

Personally, I hope v3.5.2325.0 is the final release: 2325 is the number of one of the vital RFCs that make the Internet work.