Also, forgot to mention the brilliant ending to the story. All this was happening around the same time Gizmodo and Engadget were having fun reporting "emails from Steve Jobs".
I emailed a copy of all my Genius Bar woes to sjobs@apple.com - nothing for 3 weeks, when one morning I awoke to a phone call from my local Apple Store. They said they'd heard about my troubles 'via Cupertino' and promised me if anything ever went wrong again, I'd get a full refund...!
Can't say I know too much about Loctite (as far as I know they don't sell it in the UK where I'm from), but they did point out that each of the screws had a small amount of blue substance on their bottom half. Supposedly this was meant to stop them coming loose, although clearly it wasn't much use...
You get Loctite as a brand in the UK more commonly known as superglue, the other thing you can use is thread lock - somewhere like Halfords will stock it.
I emailed a copy of all my Genius Bar woes to sjobs@apple.com - nothing for 3 weeks, when one morning I awoke to a phone call from my local Apple Store. They said they'd heard about my troubles 'via Cupertino' and promised me if anything ever went wrong again, I'd get a full refund...!