Do USB hubs cause a problem for multiple arduinos?

Do USB hubs cause a problem for multiple arduinos? What is the max number of arduino's that can be hooked to a computer? What then is their usb bandwith?

Do USB hubs cause a problem for multiple arduinos?

No.

What is the max number of arduino's that can be hooked to a computer?

Probbly more than you can afford. With a powered hub you are just on the USB limit but I don't know the number, it is in excess of 100.

What then is their usb bandwith?

With many USB / serial links the bandwidth is limited by your computer not the USB as USB / serial links don't operate very fast.

I had that problem make shure each port is mapped to the right chip model