Cannot break blocks Raspberry Pi Hard Float

[xoft]

There is some kind of a bug with furnace recipes that only shows itself sometimes on Linux. That's most likely unrelated to your current problems.

I have to say, I'm out of ideas.

Perhaps, can you connect to the Gallery server, claim an area there and try building there? The Gallery server runs on a RasPi, too. The address is gallery.xoft.cz