[arch-general] pacman has nothing to do last 5 days

For the last five days or so it reports nothing to do:- [mick@cave ~]$ pacman -Syyuu :: Synchronizing package databases... core 135.1 KiB 938 KiB/s 00:00 [######################] 100% extra 1647.8 KiB 2.68 MiB/s 00:01 [######################] 100% community 4.7 MiB 2.66 MiB/s 00:02 [######################] 100% multilib 164.2 KiB 2.97 MiB/s 00:00 [######################] 100% :: Starting full system upgrade... there is nothing to do [mick@cave ~]$ This is the first time in around 10 years of running Arch this has happened, has some thing changed in pacman that I missed?