While working with eclipse on OSX and Linux I have encountered a strange bug where the workbench window is incorrectly moved so that the window's title disappears. At least on OSX, this renders the window unmoveable and unusable.
To fix this problem, go to your workspace and descend into the .metadata/.plugins/org.eclipse.ui.workbench directory. Open the file workbench.xml and find a line that looks like this:
<window x="-25" y="-3" width="1142" height="904">
As you see, for some reason the window was moved out of my screens visible area, indicated by the negative x and y values. Just change these, relaunch eclipse and continue work :)
