Upower-0.9.16 segfaults for me on two system, amd64 and x86 both completely stable. I' filing this bug after have re-emerged entire world but there are no changes. 0.9.18 works for me. So if there are no problems CC arches.
amd64 stable
x86 stable
stable ppc ppc64
arm stable
alpha/ia64/sparc stable