Mark, i think its running in the miter slots.
Flem, i used to be one who set up the fence to match my blade angle, as i have seen on videos, but have since changed the way i do things.
i get the fence square to the table , and then i move the blade on the camber to where its cutting straight.
this is after i have checked a new machine for everything being square and plumb, i use a plumb bob, take the table/platten off and check the wheels are co planar, in other words the wheels are in the same plane, not the tilt in the top wheel thats induced to track the blade, i adjust the tilt until the blade is perfectly vertically in line with the bottom wheel, and you may use a spirit level for this if the machine is level and the bottom wheel is plumb etc. but what i am looking to see is if the front of the either wheel vs the back of the wheel is either towing in or out, and you can fix that by shimming etc.
that solves 90% of blade issues.
then i adjust the blade position( tracking) to get the blade to cut true.
now having said that, thats on my smaller saws that have a fence, on the big head saw, with the carriage, not dissimilar in principle to the "little ripper"( just bigger) i put the blade on, i make sure the teeth are clear of the wheel, as they are bigger teeth, and the set is more pronounced, and i dont want to change the set on one side of the blade, and thinking about it, every time the blades are in a slightly different place, bearing in mind i change the blade every hour or so, and i sharpen and set the blades myself, and with the carriage, it cuts true every single time.
now to be honest, i have never thought about this before , until i watched Ethans video, but i may change all my saws to a carriage type system. i have a few ideas on how to do that easily, even for when i rip bow backings six feet long, or ripping rough lams that are 3' long