Denon DVD-2910 excessive vibration?

Here is a very good article which discusses CD balance issues http://www.mscience.com/faq17.html. Redbook CDs have a particular problem with high speed drives due to the lower tolerance standards for the center hole.
The Denon 2910 spins at a high speed and has a large buffer. I do believe that is why it is less tolerant of unbalanced disks.

Please use this URL http://www.mscience.com/faq17.html
There is an extra period at the end of the one I posted.

It sounds like bloomphoto may have diagnosed why the vibration is happening, but can that be "fixed", or is it just a quirk to have to live with?

It all makes sense. I have checked out another 2910 at a different audio store and it also vibrates with redbooks. Denon says it should not vibrate, others say theirs don't vibrate, yet, all the ones I have tried do vibrate. I guess I could live with it as long as it doesn't start malfunctioning past the warranty because of the vibration. Thanks everyone for the info.

I had one of the first 5900's that had a violent transport grinding/lockup problem which at times was just an annoying vibration.
My second 5900 had no problems except macro blocking.
My first 3910 was DOA, so i brought it back to a local dealer.
The second powered up fine....but would not pass btb via dvi, had a green push, macro blocking, occasional DTS dropout and the upconversion button would not function after a few days.

Some say that made in China means nothing....but its very ironic that Denons Q/C issues were a lot higher, directly after they started making all there players in China.
I compared an Onkyo sp 1000 to the 3910, and slightly preffered the Onkyo's picture, as well as highly preffering the audio as well as build quality and dependibility.

I beleive Pioneer Elite also has a good rep for not having Q/C issues....but imo, Denon as of the last couple years has been a let down from the quality they once had.