This post is a spin-off of "New round of UI updates... apparently".
Recently we got new, differently styled tooltips, for all buttons displayed to the left of questions/answers (upvote, downvote, add to favorites, etc). It's the same tooltip style that was used for the follow button.
I propose following changes:
Use consistent visual style for the tooltips.
Currently edit, close, and other buttons displayed below posts (Including the sorting of answers) use native tooltips, whereas follow and all buttons to the left of the questions/answers use the new custom tooltips, and the cite button (on sites where it appears) has no tooltip.
I suggest using a same style for all those tooltips.
Use consistent capitalization and punctuation.
Messages in all the new tooltips start with a capital letter, and have a trailing period, except for Accept answer and follow, which don't have a trailing
.. Most of the old tooltips, on the other hand, are fully lowercase, and don't have a trailing
., except for add a comment.
I suggest tweaking the messages to make them more consistent.
Also see: Please add a delay to the hover tooltips
<a>elements and some are
titlebased tooltips present additional accessibility issues. While I haven't explored these pseudo-tooltips from an accessibility POV, I'd expect there to be significant problems. It's nearly certain that they won't be handled in the same way as would be expected for a normal tooltip.