When text is in a layer above an image that has its basic blending mode set to "multiply" the text is rendered with a darker outline. This does not appear in the final PDF, only the preview, but it makes it extremely difficult to judge font sizes and whether text is bold.

To reproduce:

1. Create text in a text box.
2. Insert a JPEG image on the page.
3. Use the Arrange option on the image to "send to back" so that it is in a layer below the text
4. Use Effects > Transparency on the image and set its blending mode to Multiply

The expected result is that the text should appear normally.

The actual result is that the text appears slightly darker/larger/bolded. This effect may be easier to see if you zoom out in the preview.