Comment # 1 on bug 1175625 from Stanislav Brabec

It was never reported before. Could you reproduce it? Every time?

Could you try 
LC_ALL=C hwclock --hctosys --verbose

And actually, could you provide output of strace?
LC_ALL=C strace -f -o hwclock.strace hwclock --hctosys --verbose

> I get this error message
> > hwclock: settimeofday () failed: Invalid argument
Is the string exact? The message I suspect should be:
hwclock: settimeofday() failed
i. e. no spaces before "()"