Bug 69424 TVT3.0: Multiple Mnemonics in Tasks -> Filters
From the main Workbench view, click the Task menu (drop down arrow) and select Filters. There are duplicated mnemonics for (D). See the attached screenshot.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MnemonicAssigner.java
* 
     * @param inputString
     * @return the string with a unique mnemonic
     * @since 3.1
     */
    public String suggest(String inputString) {
        char mnemonic = getMnemonic(inputString); 
        
        if (mnemonic != 0 && !isReserved(mnemonic)) {
            return inputString;
        }
        
        
        String stripped = withoutMnemonic(inputString);
        
        for (int idx = 0; idx < stripped.length(); idx++) {
            char next = stripped.charAt(idx);
            
            if (!isReserved(next)) {
                return stripped.substring(0, idx) + '&' + stripped.substring(idx, stripped.length());
            }
        }
        
        
        
        
        return inputString;
    }
}