bug with barlines?

[Till Rettig]

Hi,

I won't get "mensurstriche"-barlines anymore with the last few 2.11.x 
versions. It used to be, with the command \override BarLine 
#'transparent = ##t in the score context, that only the barlines on 
staves would be made transparent, not _between_ staves. See example 
D.5.1 -- there used to be barlines between staves, no it's completely empty.
How will we get these barlines between the staves back?

Greetings
Till