More work on the support for changing icon names (while looking at bug 163688), but it requires shared-mime-info 0.40 and some new API in kdelibs, so this will be for kde-4.2.

For now this code is disabled (but it works here :)

Support for generic-icon looks much more tricky though, it doesn't fit with our KMimeType::iconName(...) api (we'd need to return a list of icons).

That's for after 4.1 too.