Ah yes I hadn't noticed that. Unfortunately it replicates both steps leading to the same result.

Is there a way of preserving the dimensions in pixels when exporting a bitmap when you want web graphics at 72 dpi. You can change the export dpi in preferences but not the initial 'copy to bitmap' operation which is 90 dpi.

At the moment I'm taking a screenshot and pasting it into Irfanview.