So it turns out that a puzzle I wrote was broken. Hrm, no huge deal there, I reckon that must have happened on this blog sometime before... except it sort of is. The puzzle in question was submitted as part of a puzzle championship - and as far as I'm aware was actually "used" in said championship. Which is obviously an issue for all those involved. Well I assume it was an issue, I haven't actually heard any more on the matter. At the very least, it is a cause of embarrassment for me.
Anyhow all I can do now is apologise, and belatedly offer this one instead. It's been solved in my notebook, and in paint and I even had another look at the solution grid in the notebook. If this one's broken I think I'll cry!