In Gavarró & Solà (2004), we present evidence for non-target whsubextraction in child Catalan and provided an account in terms of Case theory. Our account crucially relies on a specific analysis of the Case licensing strategies available in adult Catalan, according to which Catalan does in fact permit wh-subextraction, although of a more restricted type than that attested in child Catalan. In this paper we aim to substantiate the analysis of adult grammar for wh-interrogatives, drawing from Kayne (2002) and arguing that wh-subextraction in Catalan is an instance of remnant movement. The paper proceeds as follows. First we consider the data on whsubextraction in the literature, from Romance languages and others, and summarise the original data on child Catalan from Gavarró & Solà (2004). Second, we review the analyses proposed for subextraction in the literature and point out some of their empirical and/or conceptual shortcomings. Third, we provide an analysis of the adult grammar of Catalan which can encompass the facts of child Catalan in a natural way and is also consistent with the facts from other languages. *