i remenber reading on this forum that its a polish thing- that when an empty text is sent its a sign that the person is thinking of you.
I think the blank text is an error. I've done it a few times. Or it could be like the wonky phone I once had that every so often sent blank messages to everyone in my phone book.
Why didn't you call back for confirmation ?
Good point. If I get a blank text I always reply saying "why did you send me a blank text" and it usually results in "didn't mean to, how are you anyway?" and a lengthy text conversation about nothing...