Nice one - been watching this with interest :D
Thanks from me as well, Jonathan!
Matt77, if you're wondering how it happened and how to avoid it... do you play slide at all?
I do, and although by theory you're not meant to be pressing the strings on to the frets, when it gets "exciting" you can put the odd groove there. It depends on the material the slide is made from, and the frets as well (how soft they are). I discovered recently that the Baja telecaster frets are a bit prone to it :? but my standard playing flattened it out after a week or so. Bit of a shame though, cos my Baja is great for slide otherwise...