Jabber I hadn't heard anything about this, but did some checking, and sadly, you are correct (As you generally are.)
Historically horse meat has been eaten in many parts of the world, including Europe as late as the 1930s - during times when other meat sources were unavailable.
Here's my source on the historical aspectg: Horse Meat for human consumption
And here's a news story on it: Congress Lifts Ban on Slaughter of Horses
Of course, I agree it sounds inhumane!