Directory _file_get was in the wrong place, causing the root folder to fail, once it was associated with dynamic context. bzr revid: p_christ@hol.gr-20100702092732-jx8tisemq7iqxtb3
To be done: ----------- * Test to not create several times the same file / directory -> May be put a sql_constraints uniq on several files -> test through remove or put * Retest everything