To install the updated gridftp server that includes a fix for secondary group membership:

for VDT 1.3.9 (which is what I got with OSG 0.4.0) in the OSG/VDT directory, do:

pacman -get http://vdt.cs.wisc.edu/vdt_139_cache:Globus-Updates

This nominally makes your VDT installation 1.3.9c, though it didn't update my vdt-version.info file accordingly -- it still says 1.3.9b

for VDT 1.3.10, similar installation should work:

pacman -get http://vdt.cs.wisc.edu/vdt_1310_cache:Globus-Updates