The new interface of Twitter is rolling out. Have you
seen it? Reply, Favorite, and ReTweet are clearly
shown when the mouse moves over the tweet..
You can better see your @mentions, Retweets,
searches and lists you are in.
These two links may be of use:
Mashable shows some screenshots
of the new interface New Twitter gives some tips
When you click Reply, up pops a clear dialogue box.
Again, a clear box pops up when you want to delete tweets.
Looking at Your Tweets, you will see that ReTweets have
a green corner added and Faves have a yellow corner
added! You can undo the ReTweet from here too.
So far I like it, though my old computer screen means
I don't see all of the two pane system clearly.
There is also an arrow to click on the end of the tweet, &
and you can view YouTube videos mentioned in that
tweet, in the side pane.