Comment 3 for bug 718204

if innobackupex allows us to run with --incremental without explicit specifying basedir folder it should work correctly, we may fix it in several ways:

1. Let innobackupex work correctly when we do incremental backup w/out specifying base folder

2. Prohibit usage with --incremental w/out --incremental-basedir

3. Combine options --incremental and --incremental-basedir, and leave one option --incremental-basedir, which will work as a trigger that we do incremental backup and at the same moment it will pass the base folder to xtrabackup