Dear All,

since LuaTeXt 0.81 my back-of-the-book index (register) is generated with
strange background colors. The index title is typeset in yellowish
background and the left column of the last index page has a blue background,
see the attachment.

I've thought I reported it, but it is still there even in 0.95. It was fine
in the version 0.80.

Could this be somehow eliminated?

Thanks, Jan