Could both the IMDB & File Details information actually display in the main MC window rather than external windows, just to make it a little cleaner?
I notice that the change movie does this & looks good.
I also notice that if you right click on a movie that gives you a context menu, is the code you are using for those context operations the same as in the new tabs? Perhaps they don't need to be in the contect menu anymore, or you need it to switch to the new tab reather than display a new window in front.
& MC still doesn't remember if its maximised when its closed....