I've received a message with no Subject. On the messages table it shows with a blank where the subject would be, meaning I can't click to open it (see attachment).
Also, I didn't receive the usual email that accompanies a message. I noticed it while browsing the "My Store" tab that I had a new message.
The message is there somewhere, I was able to get to it by checking the page's source code and grabbing the id. And it has contents, it's not just blank.
Comments
You're right @Stellar, messages can be opened by just clicking anywhere on that row