Okay, so thanks to Nico Kadel-Garcia I've upgraded subversion to version 1.7.7 on my Centos server.
Unfortunately, this did not help. The error is still the same: svn: E160013: File not found: transaction '18-16', path '/%D0%A1%D0%A3%20%D0%90%D0%9A%D0%91/doc/forth-asm/%D0%9A%D0%B0%D1%80%D1%82%D0%B0%20%D0%BF%D0%B0%D0%BC%D1%8F%D1%82%D0%B8.txt' svn: E160013: Your commit message was left in a temporary file: svn: E160013: 'svn-commit.2.tmp' I'm out of ideas. -- Andrew