Nothing new, H&R probably put the wrong front sights on em. Many BCs come with the .584" 17A front sight, I put a .404" tall 17A sight on my 45-120, many others have too. The .494" is probably the best choice for most.
You can have H&R send you the correct sight for the 357, or you can file the front sight down yourself to bring POI up if it's a plain blade sight. It it's one of the bead sights or a fiber optic, contact H&R.
You can also upgrade the front sight on the 357 with fiber optics if it doesn't have one, see the Peep and Firesights link in the FAQs.
Tim