During a network install (eg using the boot.iso image) of Fedora 12 Beta the system will ask for a network interface to be started - this is fine with a wired network, however the installer will offer "wlan0" if the computer has a wireless interface available. Unfortunately choosing the wireless interface doesn't work - no SSID or encryption settings are asked for so not surprisingly DHCP fails. This would obviously be a useful way of installing on a laptop.
*** This bug has been marked as a duplicate of bug 473803 ***