As the user's learning, then a sandbox environment wouldn't be a bad idea, depends what they're learning. More important is the information/feedback they receive so they know they are or aren't in a demo environment.

That's the same thing no?

Interesting, my understanding was that the windows OS always controlled the positioning of apps.

Use the ellipsis as a word teaser, when the next word would complete the sentence. In your example "I have a car color black" doesn't read right.

It would be better if they changed the focus colour too.

I've observed users sending to themselves and then sending to a friend, as that way they can validate what's being sent in their name and possibly edit it, this also means if the friend replies, then it goes back to the 'right' person.

@VoronoiPotato, interestint point, as actuall since I use windows which I don't trust at all I'd be quite averse to it auto-updating - I suppose how much I trust [whatever needs updating] is also a factor.

Link to your ux.stackexchange account ?

@Bevan, I think you're missing the point. Is every user of the OPs website a copy editor? Read ColinSharpe answer of this question, he phrases my point quite well.