Throwing as quickie; Some songs that can be skipped to the part where gameplay starts jam when you press the skip button. I am not sure what the pattern is, but some songs that are as Clannad - toki wo kizamu uta http://osu.ppy.sh/s/3770 do it.

Or was it that this song did not do it but megumeru did http://osu.ppy.sh/s/908

Either way other does this and other did not.

Anyway, that is one and only bug I faced. It does not lock the device (so you can exit by pressing home button) but it does lock the program - so you need to exit and start app again.

This is what I experienced with my brief playing with jailbreak and Osu - 3.0 software BTW

Yeah, I had this a few times also, but sometimes when I click it, it does go where it's supposed to, but the beats are behind. Also the only bug I've discovered. It's a pretty nice port otherwise.