I have noticed that, when I save a liquify mesh, the arrow cursor disappears behind the save mesh dialog. Instead of seeing the OS' regular arrow cursor, I can see the liquify brush behind it. This happens randomly, but more notoriously when the cursor touches any text input fields.
As you can see in this screenshot, the blue arrow I've drawn is where the cursor should be. Instead, you can see the liquify brush behind the window.
This happens with CC 2014 and remains in CC2015. Tried in various mac computers running Yosemite. Only happens in the LIQUIFY save mesh dialog, not the save document dialog.