The following API issue has, as far as I can tell, been introduced in 4.0:
The UpdateMapHighlight method does not return any data for the following map highlights on the Continent maps:
- Darnassus
- Orgrimmar
- Ruins of Gilneas
- Stormwind City
- Dalaran
- Deepholm
- Kezan
- The Lost Isles
- The Maelstrom
For all other map highlights, UpdateMapHighlight works OK.
Thanks for looking into this, would really help solving some issues in an add-on library :-)