Background independence of noncommutative Yang-Mills theory on Rn
is discussed. The quantity θF^θ−θ is found to be
background dependent at subleading order, and it becomes background independent
only when the ordinary gauge field strength F is constant. It is shown that,
at small values of B, the noncommutative Dirac-Born-Infeld action possesses
Λ-symmetry at least to subleading order in θ if F damps fast
enough at infinity.Comment: 16 pages, LaTeX2e, minor revisions (version published in JHEP