I thought this was a bit funny. I’m trying to reduce the number of different email addresses I uses, start simplifying some things, so I was changing the email listed for my twitter account, from twitter@tweak.net.au to karl@tweak.net.au I thought this would just be a field to edit and save, but no! Twitter started animating a “checking…” text beside the box, and when I’d finished, happily told me that the email was “available!”

What are they trying to find/stop? Multiple twitter accounts that have the same email address? Why is that a problem?