In Stylish I had this global style to make tooltips more readable (mainly bigger), which I downloaded, err, somewhere, way back when. Most of my Stylish styles seem to work fine in Stylus, the will-still-work-with-Firefox replacement for Stylish. But one of them doesn't. Stylus says the style is active, but it's not taking effect. I've tried commenting out everything except the size setting and then changing that around; no effect. So that makes me think the problem is in the set of stuff to match on, which is the part of this I know least about. (That list of classes and IDs came with the style. I don't know from tooltips and CSS.)

If anybody reading this can spot the problem in the following CSS and suggest a fix, I'd be grateful!

#btTooltip,
#un-toolbar-tooltip,
#tooltip,
.tooltip,
#aHTMLTooltip,
#urlTooltip,
tooltip
{
  font-size: 16px !important; 
  background-color: #FFFFE0 !important;
  color: #000000 !important;
  -moz-appearance: none !important;
  border-color: #000000 !important ;
  background-position: center center !important;
  background-repeat: no-repeat !important;
  background-attachment: scroll !important;
}