Ponovo:
https://fedoraproject.org/wiki/Ext4_in_Fedora_11#How_do_I_migrate_from_Ext3_to_Ext4.3F
Does Fedora still offer the choice of Ext3?
Yes. The regular CD/DVD install or network boot images still lets you choose either Ext4, Ext3 or XFS. The Live CD/DVD images however use Ext4 (except for /boot formatted as Ext3) and essentially transfer the entire image into the hard disk as part of the installation process and does not offer the ability to format the hard disk with any other filesystem. If you must choose a different filesystem, the regular DVD install or network boot images are the recommended alternatives.
Can I install onto ext3 from the LiveCD?
No. If you install from the live image, you have to have an ext4 root filesystem because the installer just copies over the (ext4) filesystem image from the live image. To install onto ext3, you need to run the full installer.