With the new FarmVille Trading Post feature, lots of farmers were complaining about the barrage of posts cluttering their Facebook walls. Zynga has responded by turning off the wall-t0-wall notices for the Trading Post. Thanks, big Z.
From official FarmVille Forum:
“ Hey Farmers!Great news! Trading Post Wall to Walls have been turned off. Thank you for the feedback and let us know how you like the adjustment.