2017-03-22 Murray Cumming 2.51.6 This is the first 2.51.* version of glibmm-2.4. There were previously some 2.51 versions of glibmm-2.52, which installed in parallel with glibmm-2.4, but there will not be any stable version of glibmm-2.52. There might instead be a stable version of glibmm-2.54 eventually.