Faux page curl and shadow

I'm keen for feedback on my faux page-curl effect on www.luciddesign.co.nz.

I have created a transparent PNG overlay with a subtle dark gradient from top left to bottom right and a white highlight gradient on the bottom right corner.

When you hover hover the image, the white highlight disappears and the drop shadow moves up a couple pixels to simulate the page flattening. There is also a transparent overlay with the name and date of the project.

The biggest downside is that the dark gradient overlay does dull down the colours because (as far as I know) there is no ability to use multiply with PNGs so it is effectively a grey overlay.

Any feedback or suggestions?