Display suite wrapper class overridden

Problem/Motivation

Installation comprises of D7.14 with Omega 7.x-3.1 as the theme and DS module 7.x-2.x-dev (alongside others).

The problem I am experiencing is that using any other theme the Display Suite layouts are visible, however using either Omega or Alpha themes the css class is removed from the node wrapper resulting in the visual loss of the Display suite layout. The CSS file is linked, the html structure is in place, but the class defined in the Display Suite layout template files is overridden at some point by the Omega theme.

Proposed resolution

I have had a look at the omega_alpha_preprocess_node() function, but while it defines other classes, I see no indication of it overriding existing classes. I am certain the problem does not lie here. I think I have seen this module and theme in action together, so think this may be a problem only recently introduced.

I would value either some help in finding and resolving the problem or a patch.

Original report by Dave Maude