Hmm, I'm pretty familiar with the entirety of Dragon Ball in its original form, but I don't really recall the scene where Goku grabs Grandpa Gohan's nuts as he writhes in pain (unless it happened in filler). It was alluded to that he used Gohan's crotch as a pillow when he was young, but, uh, I don't recall any painful grabbing...
Other than that, I agree that FUNimation did every possible wrong thing when it came to any of the DB series.