Two problems:

• Clicking on the ↑ link for a reference from the <references/> section does not bring the user to the correct position, as the fixed header winds up covering the line with the reference actually in it.
• Clicking on a [5] link results in multiple lines in the <references/> section being highlighted, not just the intended one. Clicking on a ↑ link from the <references/> section causes the line to break upon highlighting the [5] link. These are probably the same issue, but may or may not actually be.

The second issue may be being caused by an attempt to fix the first failing and breaking things. Or not.

Also something weird is happening with a blinking outline around the highlighted reference in the <references/> sometimes. But this is only around the correct one. This may be due to a gadget. I have no idea what's going on anymore.