Why all of the compiz effects icons changed into grey??

[Daydream_Qian]

After i have reboot as usual, i surprisingly found that my compiz fusion icons changed into Grey.....


And after open the CCSM....

All of the effects icon are displayed as a "?" Icon.....

What's more...

when i clicked Places->My computer, It pop up a window and appear:"Nautilus cannot handle computer: locations."

Also, on the Places, My home icon is empty.....

And on the sidebar of Nautilus......

File system's icon and my home's icon are placed by a simple file icon.....

Oh,my God.....

How to solve those Problems??

Only one of them is ok.....

Thanks.....