Which browser and version are you using?

Are you using an old DocumentUltimate version?

There is no problem with my browsers on the live demo:

Pages to be printed are rendered inside this tag:

<div id="print-display" style="display:none">
  <img src="..."
</div>

I suspect some CSS rule of yours in your page is conflicting, e.g. do you have a generic rule like "div img" ? Though the viewer is created inside an iframe so your outer rules should not interfere.

>I think this is related to the overlay of the print popup.

To rule out if it's related to print popup, you can use documentViewer.PrintOptions property:

documentViewer.PrintOptions.SkipDialog = true;

The problem does also appear on your demo!!!!

The above file is printed (to pdf) on your demo website.

The first page has a gray background!

SkipDialog doesn't fix this for me.

I use version: GleamTech.DocumentUltimate.5.9.7

Browser: Google Chrome (I think other browsers don't have this problem)

The only way to skip the gray background is turning 'background images' off in my print dialog.

I can do this, but our customers not.

I hope you can still fix this problem.

Strange, you are right, if "Background graphics" option is selected on Chrome's print preview dialog, the first page is gray, first time I noticed this. I thought that option is unselected by default but anyway we will fix this shortly.

Thanks for recognising the bug.

I see an fix coming!

Thanks in advance.