Seems that it does. And I would have a solution if only nginx had $request_uri_without_args...
The trick for uWSGI is to have `uwsgi_param PATH_INFO` not $document_uri (it won't work due to `rewrite ^ @nonidem last;`) but an originally requested URI. $request_uri almost does it, but fails when URI has query arguments.
On nginx mailing lists there is a suggestion to strip it myself, with Lua[1], but I'm surely not going to throw in Lua just for this.