I try to do Ctrl + Shift + W but it does not work, I get the following error: "The key sequence" Control + Shift + W "is ambiguous, use" Configure shortcuts " in the «Preferences» menu to solve the ambiguity. No action will be executed. " But I have already checked the "Preferences" several times and I can not find the sequence of keys that generate ambiguity. In addition I have checked the keyboard shortcuts of several applications individually, but I have not found the ambiguity either.
*** This bug has been marked as a duplicate of bug 319172 ***