Hi all, hope someone can come up with an answer to this puzzling problem.

This summer, I bought a Regal metal-body resonator guitar (National single-cone copy, biscuit bridge). Nice guitar, love the sound and the looks (and I personally like the reassuring weight of it, although others may not! :-). But...

I've not played it much over the last couple of months due to time pressures at home, volume of guitar vs. times I usually practise (ie. late evening), and lack of easy amplification at open-mics. But the last session I used it I noticed I couldn't seem to get it in tune. Today, I had a good go at it, and realised that it was fundamentally out of tune with itself - a note at the 12th fret was _way_ sharper than the octave from the open string, and 1st/13th frets were likewise out so it wasn't a problem with the nut.

Given this, I reckon maybe the bridge has done something strange, or maybe the neck isn't right. It's under a year's warranty from Elderly, so they'll be getting a phone call to ask what they can do about it. But I'd like to find out if anyone else has had similar problems with resonators, or Regals in particular. I've found there's tuning problems with the metal body expanding and contracting with temperature (ie. going from warm house to cold car to warm pub) - would this cause it over time? Or is it just the ambient temperature that does it, so when June/July comes back round, it'll recover?

I know from a previous thread that there's plenty of reso guitar fiends out there, so does anyone have any ideas/suggestions?

Cheers,

Graham.