Several serious bugs have been fixed in this update. Here’s a list of those which still remain. Please add more as you come across them.
Finder
Repairing LaunchServices database, rebuilding it from scratch, and controlling individual app entries – all using this undocumented command.
Sometimes macOS decides you want to open documents using the wrong version of the right app. Here’s how to fix that.
All about textClipping and pictClipping files: what they are, and how to access the data within them.
Does Mojave blend the colours you set in Accents and Highlights to create a third colour, or is the appearance of a third colour just a bug?
Accent is blue, Highlight is orange. So what the hell are those menus doing in purple?
Searching for third party Quick Actions, I came across the excellent Yoink, the only app which seems to have solved them. Or has it?
Unsupported by developer documentation or Xcode, Quick Actions can only be seriously useful when reversible. Or are they just an embellishment to Finder?
Hard links can’t be readily distinguished by macOS or the Finder, and can lead to strange anomalies, as they’re seen as additional files, not links.
The built-in Quick Actions and those bundled in installed apps are managed by the daemon pkd, and PlugInKit. Not so Automator workflows, though.
The Eclectic Light Company 