This session will not really be 'a talk', so this is not really an abstract... The session will be an investigation of two specific segmental 'problems' that I have encountered, as a native speaker of English, as I have been learning the phonology of Serbo-Croat. I'd appreciate your help in thinking about them, most specifically in terms if the extent to which they do or do not shed light on the phonology of English. The problems fall into the general area of 'co-occurrence restrictions' ('phonotactics'?). One involves morpheme-medial s+sonorant clusters, the other involves a surfeit of tautosyllabic sibilants.