I had assumed that there was a 2.063.1 prior to 2.063.2 but clearly wasn'tpaying enough attention. - Jonathan M Davis
Found the explanation: http://lists.puremagic.com/pipermail/dmd-internals/2013-June/006569.htmlThe v2.063 was an aborted 'release'. 2.063.1 is what was released. (The compiler & libraries are unchanged, what happened was the documentation was fixed.)