Beta 1.9 Prerelease 4-1
From The Lost Media Wiki
The version below is in fact Beta 1.9 Prerelease 4-2, which is the reupload available on mojang's servers, not the version that is lost that was accidentally labelled as Prerelease 3 in game, Beta 1.9 Prerelease 4-1. Due to this I edited the page back to show Prerelease 4-1 as lost. It's important to note that the -1 and -2 etc. are an arbitrary naming system used to show when a version was reuploaded and obviously don't show up in game.