I just installed a HipChat update this morning, and now I cannot use the title bar of the application as a handle to move the application window. 

The only way to make it work is to mouse over the edge of the window where I'd normally vertically resize the app window, and then initiate a left/right mouse action which lets me move the window.  (Vertical mouse action initiates window resize)

I've tried closing & reopening the app.  I've tried unfocusing & refocusing within the app and to other app windows to no avail.