It is shown that if G is an uncountable Polish group and A⊆G is
a universally measurable set such that A−1A is meager, then the set
Tl(A)={μ∈P(G):μ(gA)=0for allg∈G} is co-meager. In
particular, if A is analytic and not left Haar-null, then
1∈Int(A−1AA−1A).