Ok, so I set a password on my BB, making careful that I entered it all correctly. The 2nd prompt to confirm should have also made sure there were no errors. When my handset locked and I got prompted with the password, I entered it only to be told it's incorrect. I've now put it in 10 times, therefore meaning it's currently 'wiping my BB' - doesn't sound good.

I'm definitely not having it that I've put a different password in, twice!

It could be that your password has a number in it and you think you are pressing a number but in reality it is still all letters.