With Bump 2.0 we decided to throw out 1.x. We are only supporting Android 2.0 and up, 1.x is small enough that it doesn't matter for us anymore. This way we can focus on making the app that works better with a smaller number of differences to deal with.

That said, yes, there are definitely rough edges in 1.x to 2.x, hopefully less so to 3.x. I think only time will tell as things surface in communities like Stack Overflow.