Comment 25 for bug 571038

I followed Somogyi Ádám's solution and it did work. However I had to reinstall grub(!) and I'm having all sorts of strange error messages:

sudo gparted
Error informing the kernel about modifications to partition /dev/sda2 -- Device or resource busy. This means Linux won't know about any changes you made to /dev/sda2 until you reboot -- so you shouldn't mount it or use it in any way before rebooting.
Failed to add partition 2 (Device or resource busy)

palimpset
(palimpsest:2589): libgdu-WARNING **: Partition /org/freedesktop/UDisks/devices/sda5 is a logical partition but no extended partition exists

sudo sfdisk -d
Warning: extended partition does not start at a cylinder boundary.
DOS and Linux will interpret the contents differently.
# partition table of /dev/sda
unit: sectors

/dev/sda1 : start= 63, size= 28675962, Id= 7, bootable
/dev/sda2 : start= 28676150, size= 33254425, Id= f
/dev/sda3 : start= 61930575, size=524152755, Id= 7
/dev/sda4 : start= 0, size= 0, Id= 0
/dev/sda5 : start= 28676151, size= 1991934, Id=82
/dev/sda6 : start= 30668148, size= 31262427, Id=83