Tried to sync just now and got this:
export LC_ALL=C && sudo pacman -Su
:: Starting full system upgrade...
resolving dependencies...
warning: cannot resolve "libtevent.so=0-64", a dependency of "libwbclient"
warning: cannot resolve "libtevent.so=0-64", a dependency of "libwbclient"
warning: cannot resolve "libwbclient>=4.11.3", a dependency of "smbclient"
warning: cannot resolve "libldb.so=2-64", a dependency of "smbclient"
warning: cannot resolve "libtdb.so=1-64", a dependency of "smbclient"
warning: cannot resolve "libtevent.so=0-64", a dependency of "smbclient"
warning: cannot resolve "smbclient>=4.11.3", a dependency of "samba"
warning: cannot resolve "libldb.so=2-64", a dependency of "samba"
warning: cannot resolve "libtdb.so=1-64", a dependency of "samba"
warning: cannot resolve "libtevent.so=0-64", a dependency of "samba"
warning: cannot resolve "libtevent.so=0-64", a dependency of "libwbclient"
warning: cannot resolve "libwbclient>=4.11.3", a dependency of "smbclient"
warning: cannot resolve "libldb.so=2-64", a dependency of "smbclient"
warning: cannot resolve "libtdb.so=1-64", a dependency of "smbclient"
warning: cannot resolve "libtevent.so=0-64", a dependency of "smbclient"
:: The following packages cannot be upgraded due to unresolvable dependencies:
libwbclient samba smbclient
:: Do you want to skip the above packages for this upgrade? [y/N]
Edit: went ahead anyway and it seems ok.