Suggestions as to which mobile browser is best for PBS on an iPhone? I have Chrome, Firefox, Safari, and Opera installed. I've already discovered that some of the features don't work in Safari.

Bren, I can't answer your question as I do not have an iPhone.  If (as it appears), you don't receive an answer here, you can send your question to the PBS Team via the Contact Us link at the bottom of the page under Company.  The programmers are no doubt familiar with which browsers, etc., work best with which devices...

I use Chrome on my (Android) phone, seems to work great except for cut/paste in the forums.

Don't have an iPhone but I do have an iPad with pretty much the same iOS. I use Safari on my iPad and have no problems.

I use Safari without any issues.

FWIW, I've also had trouble using Safari on my iPhone and MacBook. Specifically, the "search" function on the WL never works for me on Safari. No matter what term I enter in the search field, it just returns the entire list to me as a result. Because of this, I use Chrome for PBS on both devices. Good luck!

On the other hand, I just ran a wishlist search on my iPhone in Safari and it worked. I tried both hitting Enter and pressing the search button. They both worked. It used to be in Firefox on my PC, hitting Enter would show the whole list so you had to be sure to press the Search button. Now both of them work in Firefox. Wish list search was broken for everyone lately, but it has been fixed, so it may be worth another try.