How to enable Oxygen Style for designer-qt4?

[Felix Homann <fexpop@onlinehome.de>]

Hi,

possibly slightly off-topic:

On one of my machines Qt4 apps, especially designer-qt4, are displayed 
in Oxygen Style, which is a KDE 4 style i guess. On the other machine, I 
 can't even choose Oxygen Style for previews in designer-qt4.

Does anybody know which package might be missing on the second machine?

(Both running Sid with a couple of packages from Experimental; first one 
is i386, the second AMD64.)

Thanks,

Felix