LURE: Skorl doesn't follow Minnow into cellar

ScummVM:
0.13.0svn (Jan 1 2009 18:22:27) through 0.12.0 (Aug 29 2008 11:01:26)

Game:
Lure of the Temptress (DOS/German) (other language version may be affected too)

Details:
The skorl doesn't come down with Minnow after I sent Minnow to bring the skorl downstairs. Minnow comes alone. It prevents me from completing the game.

I tried both ways:

1. Talk to Minnow to call his master to the cellar ("Sag dem Skorl, daß jemand im Keller ist."). Open barrel (use the tongs on the bung). Hide.

2. Open barrel first. Talk to Minnow to tell skorl that wine is flowing out ("Sag dem Skorl, daß eines der Fässer im Keller ausläuft!"). Hide.

Platfrom:
Win32 (WinXP SP3)