Audio Dropout "toast" notification upon project save

Something I've just noticed - it might be new in 'G', or not:
 
SONAR has started popping up (x) Audio Dropout: The audio engine has been stopped unexpectedly when I save a project. 
It's remarkably consistent:

• Open a project
• Playback the project.
• Stop the playback. Wait for a second or two to make sure reverb tails or whatever aren't sounding.
• File: Save.
• Project saves, and then immediately (x) Audio Dropout: The audio engine has been stopped unexpectedly.

Is anyone else experiencing this?