I upgraded to fedora 14 at work yesterday.  For the most part the typical processes I've written about before worked fine.  But two places exposed some caveats.

First, network based installation using nfs doesn't work. What happens is that after the bootloader info is taken some attempt to access the nfs mount is made that causes an error message to pop up.  The message says something about a umount error for /mnt/source or similar.  Checking the shell on vt2 it looks like the NFS mount is there and accessible.

The mount appears to be NFS4 based.  I tried switching to NFS3 but that didn't change things.  I failed to figure out if there is a work around for NFS based installation.  Eventually I switched to installing using HTTP.  HTTP and FTP installs are also supported for network based installations but these require either having an nameserver running on the network or that your web server doesn't use virtual hosts (so using an IP address instead of a host name will work properly).  With an NFS (in my case I use the nfsiso option) you can just specify the IP address and don't have to worry about virtual domains or nameservers.

The real issue with this, however, is that the error occurs after the installation has wiped your boot partition.  It seems to me that the mount and checking of the mount can occur before any destructive actions are taken on the hard drive.  If you hit this error the first thing you think of is “crap – I can't go back to my working system cuz it just reformatted the root partition.”

The other issue is related to the nvidia drivers.  By default f14 installs the nouveau driver which is the open source driver for nvidia cards.  To get the drivers from nvidia you install the kmod-nvidia package (and related package(s)) from the rpm'Fusion repository.  The two drivers apparently don't like each other so you have to disable the nouveau driver on the kernel command line (in grub.conf) and then install the kmod-nvidia driver.  There are some other steps as well.  Unfortunately, the driver didn't install for the default kernel and the kernel it did install with didn't work with the driver.

Up till now I've never had a problem with the kmod-nvidia driver installing and working.  Fortunately the nouveau driver works well enough for my needs (no eye candy or game playing required at work).  So I just re-enabled it and the video works fine.  The only minor complaint is that my desktop background no longer spans both monitors.  The kmod-nvidia driver apparently allowed that with F11-F13.  No biggie.  I just have two monitors with identical backgrounds.  The desktop functions identically to the kmod-nvidia driver in every other way.