Than

swalling wrote:

Is this related to the change "The superscript (sup) line-height is now set to 0, to fix a long-standing problem with reference numbers affecting the leading", mentioned in [[:mw:Typography Refresh]]? It says we changed this to resolve bug 49965.

swalling wrote:

The other option here is that there is some kind of local nlwiki style causing this. When I view the same article on enwiki, dewiki, and eswiki I see no such bug, and nlwiki has the following in its Common.css:

sup,
.reference {
vertical-align: text-top;
position: relative;
font-size: 0.80em;
top: -5px;
}
sub {
line-height: 0;
}

Steven is correct. This is caused by local wiki css at https://nl.wikipedia.org/wiki/MediaWiki:Common.css. The solution to the bug is to just remove the custom CSS (or adjust it if they prefer).

(In reply to Steven Walling from comment #2)

Is this related to the change "The superscript (sup) line-height is now set
to 0, to fix a long-standing problem with reference numbers affecting the
leading"

(Slightly off-topic, but let me ask anyway)

Is there a reason why it's 0 instead of 1em? We have a CSS rule for this at pl.wp too, ours uses 1em and it serves us well. :)

https://pl.wikipedia.org/wiki/MediaWiki:Common.css

#bodyContent sup, #bodyContent sub {
    line-height: 1em;
}

The problematic rule has now been moved to core MediaWiki in a slightly different form; I think this will no longer be causing any issues, but the local CSS override can be removed anyway as a similar fix will be applied in core for all skins.

I've removed the local css, see here: https://nl.wikipedia.org/w/index.php?title=MediaWiki%3ACommon.css&diff=40947882&oldid=39889709

Thanks. Let's mark this bug as resolved, then.