Right side usb and esata ports not working

Hi,
Just got my M15x a few days ago and when I try to synch my iPhone when it is plugged into either the regular usb or the esata combo port on the right side, it isn't recognized by iTunes and I get weird errors like "Can't read/write to disk" and "can't synch, required file not found". But if I plug it into the usb port on the left side, iTunes sees it fine and synchs properly.
Could anyone with an iPhone please test their usb ports on the right side and see if they work, or is anyone else experiencing this issue? Does it look like I got a bad mobo out of the box? Any help appreciated

 

its a known problem with only iphones and ipods. no real fix yet but atleast you can still use the left side to sync. and usb and esta still works for other usb and esta devices.

 

I knew people were having issues with iPhones and the new i series chipsets but didn't know it affected certain usb ports, thanks for the info

 

Turns out it was a bad audio/usb card. Tech came out and replaced it, it's not the main mobo but a little board with the esata,usb and audio jacks, and sure enough, replacement works fine.