Yep, I learned to take pictures of the dimensions and weight of every golf box going to UPS. They seem to flag anything over 45" and say it is over 48" which requires oversize charges.
Luckily, the appeal through PirateShip is easy. Load up the pics and submit. I've won the appeal every time so far.
Note - I now have a folder on my hard drive with pictures of a 46x6x6 box (against a 48" ruler), and half a dozen pictures with a golf box at different weights. So I don't have to take new pictures every time.