experimentalfeatures 2

Hello there,

can anybody tell me what "experimentalfeatures 2" stands for?

Wiki says: "1 2 Very experimental support for new stations (don't ask how it works yet!)"

Today I installed Beta 9 today and turned experimentalfeatures off (in my latest version it was set to "2"), but then after loading an older game (Beta 2 or 3) all engines with tender (Schlepptenderlokomotiven) where uncoupled from their cars and turned so that they crashed into them. Clicking on those uncoupled engines showed a train window with only the engine, as if I had built just a loco. Clicking on the cars led to a crash of TTDPatch.
This bug didn't occur after setting experimentalfeatures back to 2. It also didn't appear on older savegames.

AppName: ttdloadw.ovl AppVer: 0.0.0.0 ModName: ttdloadw.ovl

ModVer: 0.0.0.0 Offset: 001754df

I just want to know what the second bit stands for.

Greetings and guten Rutsch ins neue Jahr (Happy new Year!), as we say in Germany.

Thomas