When trying to move a document to the parent folder, I have the exception :
[Wed Dec 03 13:55:27.177507 2014] [:error] [pid 3474] [client 80.15.1.178:57555] PHP Fatal error: Uncaught exception 'Exception' with message 'Process exited with an open transaction! The transaction will be implicitly rolled back. Calls to openTransaction() must always be paired with a call to saveTransaction() or killTransaction().' in /home/phabricator/libphutil/src/aphront/storage/connection/AphrontDatabaseTransactionState.php:69\nStack trace:\n#0 [internal function]: AphrontDatabaseTransactionState->__destruct()\n#1 {main}\n thrown in /home/phabricator/libphutil/src/aphront/storage/connection/AphrontDatabaseTransactionState.php on line 69