Last.fm not working with latest pre-release?

[wimpers]

I always get a popup like this, and if I leave it open the next track just gets added.
Tracks are not scrobbled in the lecacy client (2.1.37) nor added on the site.

And there is no log info in either the Windows logs, Last.fm nor Strawberry user data folders.

I'm almost sure this behaviour did not occur with the normal release...