I really hate that. Some other apps. also do it (some OpenOffice components for example). It also happens under GNOME though to some extent, so I guess it's more the fault of the particular app. rather than the DE. It's very annoying since I tend to like dark color themes, only latter to find out that some of my favorite apps. end up looking like crap and unusable because of it.
No announcement yet.
KDE SC 4.7 May Utilize OpenGL 3.x For Compositing