Can't move certain windows

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http://askubuntu.com – I am using ubuntu 12.04 and after using browser and listening to songs for sometime...I can't move totem from the title bar..When clicking on the title bar it Lowers....but I can use alt+left mouse button to move it!....I experienced the same thing with Skype too..there may be more apps including the browser that have the same problem...Is this because of the compiz?... there is another thing....after restarting PC, I have to re-setup the hover effects (I have setup show desktop when hovering on the bottom left,show windows on bottom right, Show work-spaces on top right by using ubuntu tweak (HowTos)