Blanking your partition table using the 'o' + 'w' commands running fdisk in the installer does not work. Removing all partitions individually with 'd' and then 'w' does work. BTW- Why is there no 'component' for fdisk in bugzilla?
Because its in the util-linux package. Just do a 'rpm -qf <binaryname>' to find out what package a file is in. This doesn't work in user-mode either, so I don't think its a anaconda related issue.
*** Bug 19264 has been marked as a duplicate of this bug. ***
fixed in util-linux-2.10s