Temporary videoeditor files get not deleted

Since upgrading our distributed MH cluster to 1.6.1, we see several new directories on the shared storage (on NFS) in the root directory:

[root@mh1 storage_prod]# ll
total 99
drwxrwx---. 58 matterhorn matterhorn 58 Apr 29 08:29 .
drwxr-xr-x. 4 root root 4096 Jan 29 2014 ..
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 14 17:28 6401816
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 14 18:53 6402358
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 15 09:45 6402574
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 15 10:28 6402576
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 15 10:51 6402577
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 16 15:27 6403567
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 16 14:18 6403568
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 17 08:30 6404451
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 17 10:18 6404660
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 20 08:51 6404885
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 20 08:49 6404886
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 20 09:16 6404887
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 20 13:50 6406393
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 20 13:39 6406394
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 08:46 6406910
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 08:37 6406911
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 10:37 6407887
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 10:58 6407889
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 10:38 6407932
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 14:04 6408625
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 21 17:36 6408987
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 22 07:29 6409373
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 22 07:33 6409374
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 22 11:35 6410176
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 22 11:57 6410181
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 07:20 6410885
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 07:17 6410914
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 08:58 6410925
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 11:41 6412353
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 13:47 6412365
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 23 14:12 6412480
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 24 08:52 6413651
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 24 08:48 6413652
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 24 09:02 6413653
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 27 08:48 6416901
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 27 08:51 6416902
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 27 14:32 6417600
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 27 14:39 6417856
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 28 08:09 6418567
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 28 08:00 6418568
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 28 08:51 6418569
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 28 14:10 6420454
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 07:03 6421440
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 07:21 6421441
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 08:06 6421442
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 08:25 6421450
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 08:23 6421651
drwxr-xr-x. 2 matterhorn matterhorn 2 Apr 29 08:54 6421652
drwxrwx---. 3 matterhorn matterhorn 3 Jan 7 2014 archive
drwxrwx---. 2 matterhorn matterhorn 2 Mar 19 2014 archive-tmp
drwxrwx---. 4 matterhorn matterhorn 4 Jan 7 2014 distribution
drwxrwx---. 10 matterhorn matterhorn 14 Apr 1 08:21 etc
drwxrwx---. 2 matterhorn matterhorn 2 Apr 28 20:56 fileupload-tmp
drwxrwx---. 2 matterhorn matterhorn 2 May 20 2014 inbox
drwxrwx---. 7 matterhorn matterhorn 7 Mar 30 10:38 solr
drwxrwx---. 3 matterhorn matterhorn 3 Jan 7 2014 work

These directories occurs after the videos got edited with the videoeditor and it starts processing them.