I heard the RCs had backwards compatibility issues, like that block puzzles made before 2.50.0 and on 2.50.0 couldn't be solved. Is this backwards compatibility thing fixed now?

Also, wouldn't it be better for the official download to say "2.50.1" instead of "2.50" to avoid confusion, especially when I tell somebody on what version a quest of mine should be played. 'cause the last 3 are for 2.50.0 and the next one will be for that, too. And then later the ones made on 2.50.1 will probably not work on 2.50.0 (for those who downloaded it from the main downloads before 2.50.1 came out and are not following news, only seeing that the latest download is still "2.50", not realizing the change).