This topic is so interesting that I find myself forced to register here.

When I read in the “plus+disc†about the test version I was always thinking that this version supposed to be the final release and from what I understood it contains all heroines’ routes unlike the half-moon edition with only "near side moon" route, I was even thinking that the test version contains also an unfinished route of satsuki and since it’s not a commercial release maybe the ero-scenes are uncensored too. (If those Suppositions are true then I will be the happiest man in the world if I get this version).
But something may have happened in the past that make type-moon change the endings and make this version just a test play version.
When I discussed about this with a friend he told me that the probable reason of the change is the decision to make a sequel: in consequence the endings are edited so that they can make a sequel later, like in the case of akiha true end(she had a sequel in kagetsu-tohya).
Maybe we can find more details if someone search with Google using the original Japanese expression that means “tsukihime test play versionâ€, sorry but I don’t speak Japanese.

I wish they add this version as a bonus in the tsukihime remake.
i don't understand too what they mean by “the ending of akiha in the test play version is really valuable now.†and "the world of adults shows its dirty side".