Subtile style changes for components

This is more a topic addressed to the developers of Revolution, but if the community has an answer - please feel free to share!

OK, the problem is as follows.

VisionCart has a treepanel which is used to link products to multiple categories. We’re current developing a component that does much the same, but then for custom components that work with VisionCart. The problem presents itself in the backend, where panels and treepanels no longer provide a scrollable window (or rather a content container) on the right hand site. In the early days, 2.0.8 and so on used to have a little bit of padding on the right side, but that’s gone too.

So the main question is, what subtile style changes have been made and how can we fix this using core ExtJS 3.1.1.

Thanks in advance!

--edit
To break it down a little, MODx used to scroll in the window. Now it has 2 containers, one for the resource panel and one for the components. Both are overflow: hidden containers inside the body itself.

Come on party people, no one knows what’s changed? I’d expect it to be a little change in the stylesheet or something...

Have a look to quickCMP.
http://modxcms.com/forums/index.php/topic,54729.msg315441.html#msg315441
I use a bit of extjs now, to get the content into the scrollable area.
I hope this can help.