There's a new release of dhcpcd: http://roy.marples.name/projects/dhcpcd/timeline?t=dhcpcd-6.10.1&n=200 It fixes one important crasher (among others) inhibited when doing suspend and resume of my laptop. It's very annoying. More info about the bug to be found here: http://roy.marples.name/projects/dhcpcd/tktview/025878a5149181973e13e28f1fde4ced25e39fd0
dhcpcd-6.10.1 is already in the tree; it has been in ~arch for about a week.