  We extract constraints on the pion distribution amplitude from available data
on the pion-photon transition form factor in the framework of light-cone sum
rules. A pronounced discrepancy $(2.7-3)\sigma$ between the Gegenbauer
expansion coefficients extracted from the CELLO, CLEO, and Belle experimental
data relative to those from BaBar is found. Predictions for the pion-photon
transition form factor are presented by employing a pion distribution amplitude
obtained long ago from QCD sum rules with nonlocal condensates. These
predictions comply with the Belle data but disagree with those of BaBar beyond
9 GeV$^2$.
