I emailed Dell on Wednesday night, but haven't had a response, despite them saying they respond in 24 hours (though it could be my rubbish bigfoot service that has incurred a delivery delay), so I am going to phone them today.
I could return for a refund, but there is a £10 or £20 return carriage charge (can't remember which - depends on the item). I will start by insisting on a new replacement before accepting to pay return carriage charges. I agree with CaptainCrash that since I have just paid for a new monitor, accepting a refurb is not acceptable... if it was faulty in it's third year of warranty, then I might accept a refurb, but not in week 1!!!
To be safe, anyone know how to access the service menu?
Regarding the resolution, this is a 16:9 ratio monitor, not 16:10. It's a 23" monitor, but the difference ratio means it is the same height as a 22" 16:10 monitor, but about a 1.5" wider... the big difference though with this monitor is the high res, 2048 x 1152... so the screen is much bigger than my old 22", but the higher res means great desktop real estate and crisp game graphics!
I'll report back after speaking with Dell.