Stepmania font problems

Hello,

I'm using Stepmania v. 5.0.7 (20150331) with default theme and I have following problem:
In menu are all characters OK (see img 1 - Edit/Share ěščřžýáíé), but in song selection screen is problem with some czech characters (they're missing and replace with questionmark - see img 2) - text should be 4-3-2-1 Tancuj (Panáčky)

Can somebody help me with this?

Thanks