  We describe some ways how higher order corrections can reveal themselves if
integrated over the infrared region. We show that in different renormalization
group (RG) schemes and for some observables one has no factorial divergences.
We argue that for treating things in the infrared region it is preferable to
start with a RG scheme without the infrared Landau pole in the running coupling
constant. The uncertainties for the $\tau$ lepton width resulting from
accounting for higher order corrections are discussed.
