The release was too early. I could blame it on the guy posting the android version for 0.2.3.0...
Well, no, it's on me. But the trigger was his post, because I really didn't want having to face a ton of additional problems with the android version.
Things like the missing appointments are not really a big problem. It doesn't stop anyone from playing and it can be fixed later. It's just the achievement that's missing. The game still works.
The main problem is the backward compatibility. There are save games still in use that have been created with version 0.1.0.0 or similar. Testing and thinking about every possible thing that could go wrong with that is more or less impossible.
The game uses a ton of classes and the main classes (like girl and guy) use lists of classes and so on. If in huge lists like in the conversations/messages even one conversation has a missing attribue (like "image"), normaly no one notices it for ages, because the message is on page 750 and no one will ever go there and click it.
But if I start and make a general update to the conversations and have to loop through all of them (like I did with 0.2.3.1), every entry where the attribute is missing will lead to a crash.
It's not an excuse, just an explanation
And yeah, more coffee might help, but I guess more sleep and taking more time will work better.