After upgrading to LR 4, I found that a slideshow I had created in LR 3 had lost most of its features, including the music and text associated with it. After replacing these features, as well as some others that were missing, I found that the Dock was disabled altogether and the top tool bar was hidden unless I moved the cursor to the top of the screen and held it there. I have downloaded and installed LR 4.1. I use a MacBook Pro with v. 10.6.8. Anyone else have this problem? Anyone know how to fix it?
Try hitting the 'F' key a couple of times to cycle through the window size options. My guess is that you've switched Lr into Fullscreen or Fullscreen with menu mode. Using the'F' should allow you to cycle throug the 3 screenmode options. The Dock to be available in at least one of the views. As to the top toolbar, click on the triangle to open the context menu and choose 'Manual' (see screenshot below).