I suspect that I'm in the minority because it irritates me when people don't read the whole thread and as jane says you can post something and then someone repeats the information. It's even more annoying when someone else repeats what has already been posted and then other posters think that information is great!
I realise that this happens on all boards, but can't people even be bothered to skim through looking for the OP's name so they can at least be aware of what extra information they have given?
I'm used to seeing CBA on other boards, but I completely agree with the suggestion that posts by the OP should be in a different colour. Unless you're saying something like 'I will read the whole thread later, but I wanted to say xyz right now.', I think not reading what's already been posted is saying my time is more important than yours, or my opinion is more important than yours.
I was going to say I'm sorry, but that's how I feel, but actually I'm not sorry, I'm just being honest.