Hi, In the course of reviewing Steven's FCSR patch yesterday I came across a regression which I have inadvertently introduced with my FPU handling updates last year as well as a missed case not addressed there, both in ptrace(2) handling. These issues are corrected with the two changes presented here. Please apply ASAP and backport as far back as applicable, which is 4.0 AFAICT. Thank you and apologies for the mess. Maciej