[bcardarella]

the 'd' syntax for sending DMs has been around from nearly the beginning (or from the actual beginning?) of Twitter. That in itself is not a bug. However, Twitter should be stripping that leading 'd' from anything that is reposting or from a 3rd party OAauth session.

[TillE]

It's not a bug per se, but it's certainly a hideous misfeature to have ever had that kind of input parsing except on the SMS interface to Twitter. It's just completely unnecessary.

[TazeTSchnitzel]

This isn't the first bug to be found because of it!

[raverbashing]

Exactly this

There were worse commands, I remember there was a 'follow' command (not sure it was called like that), twitter disabled this

The d command has some user experience value, however, yes, it makes no sense for twitter to accept it on non twitter apps (meaning, those that don't provide the twitter experience - like mobile clients, tweetdeck, etc)