Problems with Grub2 boot

Hello Guys,
after having made an update which contained a file kernel was introduced in my boot "grub" a new line of fedora-new kernel.
and returned to start for this new option. That already happened in the past, I did grub2-set-default "Windows Vista (loader) (on / dev/sda2)" all went well, so now with kernel upgrade happened:
[root@linux-casa ~]# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub.cfg ...
Found theme: /boot/grub2/themes/system/theme.txt
Found linux image: /boot/vmlinuz-3.8.5-201.fc18.i686
Found initrd image: /boot/initramfs-3.8.5-201.fc18.i686.img
Found linux image: /boot/vmlinuz-3.8.4-202.fc18.i686
Found initrd image: /boot/initramfs-3.8.4-202.fc18.i686.img
Found linux image: /boot/vmlinuz-3.6.10-4.fc18.i686
Found initrd image: /boot/initramfs-3.6.10-4.fc18.i686.img
Found Windows Vista (loader) on /dev/sda2
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 170
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub2/grub.cfg.new file attached.done

any solutions???