Hi Andriy. Thanks, it appears that it was partially my fault. I've miscopied the namespace (missed one letter :) so, that must be just a wrong warning... what it should be telling is that it doesn't know what namespace URI refers to, and not that the class isn't used. Otherwise the -keep-all-type-selectors should've worked. I'll file a bug on this one and post back the link when I find the time.
Best. Oleg
