Hi Paul, > I was told on IRC that the thing file has to detect the delta is if the > file is executable. Has your test .so an executable bit set? Yes. Deliberately, it seems: https://bugs.debian.org/896840#22 (This is kinda non-intuitive and kinda broken of file to do such things, but I'm not 100% sure..) Regards, -- ,''`. : :' : Chris Lamb `. `'` lamby@debian.org / chris-lamb.co.uk `-