Segmentation fault caused by /usr/share/mime/inode/directory.xml

When you are working with your qt application and you try to load a predefined dialog (in my case a QPrintDialog), application crash for a segmentation fault caused by /usr/share/mime/inode/directory.xml.
After the application crashed in bash appear this message: /usr/share/mime/inode/directory.xml:1: parser error : Extra content at the end of the document.
This problem only appear with GTK+ theme, because on other platform (windows) and with others styles all are ok.