We keep up to date on the build version, but the first decimal version (4 in 5.4, is that considered the minor version?) usually involve at least some backward-

We keep up to date on the build version, but the first decimal version (4 in 5.4, is that considered the minor version?) usually involve at least some backward-incompatible changes, so there is usually a need to test the codebase against new minor versions.