Hi Oleg
Linux uktnlx01 2.6.32-5-686 #1 SMP Sun Sep 23 09:49:36 UTC 2012 i686
The above distro causes the error for copying directories with path delimiters /
I've not tried on any others. I work with CentOS available. I'll be honest, I've lost track of what you'd like me to check on which distro? When I get time later this week I'll download your latest and check for problems with files and folders on Debian and CentOS.
Luke