With the current F11Alpha candidate (anaconda 11.5.0.11), when installing from CD on i386 or DVD on ppc, the installer hangs after pressing "Next" on the Network screen. The last messages in anaconda.log are: moving (1) to step network moving (1) to step timezone Nothing interesting or relevant appears in any other logs. I have yet to complete an install of F11Alpha from media.
*** This bug has been marked as a duplicate of bug 482907 ***