  We live in a dusty Universe, and correcting for the dust extinction and
reddening affects almost all aspects of the optical astronomy. Recently
Schlegel, Finkbeiner & Davis published an all-sky reddening map based on the
COBE/DIRBE and IRAS/ISSA infrared sky surveys. Their map is intended to
supersede the older Burstein & Heiles reddening estimates. In this paper I test
this new reddening map by comparing the reddening values for a sample of 110
$|b|>5\deg$ Galactic globular clusters selected from compilation of Harris. I
find a good agreement for globular clusters with galactic latitude $|b|>20\deg$
and fair overall agreement for globular clusters with $20>|b|>5\deg$, but with
several significant deviations. I discuss four individual clusters with largest
deviations, NGC 6144, Terzan 3, NGC 6355 and IC 1276, in order to investigate
the reasons for these large deviations. It seems that the new reddening map
overestimates the reddening in some large extinction regions. However, with its
high spatial resolution the new reddening map can be used to estimate the
relative variation of the reddening on scales $\lesssim 10'$.
