Visit https://en.wikipedia.org/wiki/SATB?useskin=minerva while logged in with page previews enabled via Beta features (https://en.wikipedia.org/wiki/Special:Preferences)
Note the horizontal line that cuts through the preview here:
Seems to be caused by a css rule in Minerva for all footer elements. This css rule should be restricted to the skin chrome so it doesn't apply here.
- Install Popups and MobileFrontend and Minerva skin
- Hover over a link to see a page preview. Note the line above the cog.
Before and after your change the Minerva footer should look the same
The footer css rule should only impact the Minerva footer.