Resolution setting not being observed in PDF output

[AlanKearns]

I have created a PNG at home that's 171px wide and at 300DPI. I'm trying to use it as a background image to a DIV, such that it's 1.5cm wide.

I have created a similar one before, exact same size, same DPI, that looked crisp and clear and fits the width in the PDF perfectly.

This one though, renders very large. I'm pretty sure as though it's going into the PDF at 96dpi. It behaves the same if it's inserted direct on a topic (i.e. not called by a stylesheet).

I can't see any difference in the CSS, Target settings (PDF downsample is off), File|Options | Autoresize, so what else might cause a difference between the two Flare machines? Something about the Page Layout it's going in?

[AlanKearns]

Weird. I changed the PDF downsample setting, File|Options | Autoresize, and PDF/UA tagging, saved and rebuilt, then changed back and rebuilt, and now the image sizes correctly.

[AlanKearns]

And now I've switched Page Layouts, it's gone back again! (On both layouts)!