Creating part of instrument with linked tab staff creates pitched staff with tab clef instead of tab staff

1. open attached score
2. File->Parts...
3. New All
4. OK
5. Switch to "Guitar" part

Expected result: The guitar part should consist of a pitched and a linked tab staff like in the score.
Actual result: The guitar part consists of two pitched staves, second one has tab clef.

Using 311f614 on Ubuntu 12.04.