This is an important point. Looking at the picture you posted in the Show Us Your Basses thread, it looks like the A string is wound around the tuner post only one to one and a half times:
The string should be wound around the post at least two to three times, and each winding should be lower than the previous one. The tuner for the A string is farthest from the nut, so it’s really important that the string is angled down properly.