Um, maybe I've hit a quirk? In my solrconfig.xml, my special SearchComponents are installed only for a specific QT. So, it looks to me as if that QT is not propagated into the request out to the shards, and so they run the ordinary request handler without my components in it.
Is this intended behavior I have to tweak via a distribution-aware component, or perhaps a bug, or does it make no sense at all and I need to look for some mistake of mine?