this is my first attempt to install Arch Linux on my Dell XPS 13 (L322X) laptop in UEFI mode. I've dowloaded "archlinux-2014.02.01-dual.iso" and written to my USB pen drive with the dd way. I boot my laptop with the usb pen drive in my LH side USB port (RH side won't recognize the system), press F12 while loading and I select USB from the UEFI boot menu list. The bootloader menu appears and I select "Arch Linux archiso x86_64 UEFI CD", the screen gets black, the usb pen drive led flashes a few times and then the system gets stuck there. Nothing happens... I can only press the power button to power off the laptop. I've tried also with a different usb pen drive and with unetbootin instead of dd but I get the same result.
Note: On that laptop I sucessfully booted (and installed) Ubuntu in UEFI mode in the past.
Note: if I boot the arch installation media in legacy way from the same usb pen drive, I successfully get to command prompt
EDIT: after many attempts I decided to try the previous installer iso "archlinux-2014.01.05-dual.iso". This one works also in UEFI mode (I used unetbootin to "burn" it to my usb pend drive). So my feeling is that current iso (archlinux-2014.02.01-dual.iso) has some issues with UEFI. I've filed a bug report on Arch bug tracker