Being in the UK I have the might of our much derided, expensive consumer laws behind (by people in countries with little consumer protection in the country). I don't expect to have too much trouble returning it if I choose to if the update doesn't resolve it.

I did check with the store manager if he thought I'd have any hassle. He said 'come in and ask for me', and gave me his business card. I have no reason to doubt his sincerity.