Good afternoon, everyone!

I am in the process of writing a fantasy novel and I need some assistance.
I have written the majority of my novel from the main character's POV, but there are a few events that occur outside of the character's view, i.e. while he's in one place, something else important is happening elsewhere.
I am wondering - is it acceptable to dedicate certain chapters to these seperate events without causing a POV shift? Example: I have a kid who enters this realm and we travel along with him for a while but his presence has sent ripples through the realm. The reader travels, via three separate chapters, to find out where the shift occured and who was involved and what happened. It is very important because without this, the people who are to help the protagonist reach his end can't hook up with him. There are two secondary protagonists who are very strong characters who are born from these events that occur out of the sight of our main character. These three characters show how they hook up with the main character.
There is also one later chapter where I have one of the protagonists in a "pickle" if you will and the chapter is focused a lot on her; however there are constant references to the main character. I have heard that this is okay since the reader never forgets the main character is looming in the background.
Tad Williams and Robert Jordan have used this trick of chapter/POV separation and I was never confused by it but I'm not sure if publishers and editors accept this style of writing anymore. JRR Tolkien also used multiple POV's and while the book was somewhat confusing, it didn't make it any less of a classic.
Also, sticking with POV: I have a "scene" where my main character is speaking with someone and the main character walks away, leaving the other person speaking to someone else about the main character. Do I have to show a separation with *** or something else to show a change in POV or is it acceptable to see the main character "walk off stage" and gently transition into the other conversation where the two characters are speaking of the main character? I have had so many people read this passage in my novel and they are not confused by it, upset by it as they see the main person leave and they are left in the presence of the other two. However, on this site, all I hear is how the author has to show some sort of break when changing POV.
Jen
"There are books of which the backs and covers are by far the best parts." Charles Dickens