Hi Szabolcs, FUSE was not upgraded this time, it's still 2.7.0-glfs7. > One of the main change which came with fuse-xxx-glfs8 was change in flock and fcntl, to support this posix locks issue. Please can you confirm that this issue exists with fuse-2.7.2glfs8 and any of the latest 1.3.8preX or latest TLA code? Regards, Amar