The layout in fact could not be more perfect on an iPhone.
Tell us whatever you did, so that we can refer other people to do the same, please!
I simply removed the viewport metatag, and removed the overlay
The overlay doesn't work on mobile phone perfectly (it has to have its size computed on runtime, as I let the user bios grow as needed).
Also it is useless on mobile phones, as its only removed on mouseover (it gives the glow effect on the desktop browsers), and put back on mouseout.
As a good side effect, with less javascript floating around, the page renders faster.