diff --git a/libisoburn/libisoburn.h b/libisoburn/libisoburn.h
index c15cc1a6..22e8bda8 100644
--- a/libisoburn/libisoburn.h
+++ b/libisoburn/libisoburn.h
@@ -2065,13 +2065,17 @@ int isoburn_get_min_start_byte(struct burn_drive *d, off_t *start_byte,
                                int flag);
 
 
-/** To choose the expansion method of Growing:
+/** Start production of an ISO 9660 image using the method of Growing:
     Create a disc object for writing the new session from the created or loaded
     iso_volset which has been manipulated via libisofs, to the same medium from
-    where the image was eventually loaded. This struct burn_disc is ready for
-    use by a subsequent call to isoburn_disc_write().
-    After this asynchronous writing has ended and the drive is BURN_DRIVE_IDLE
-    again, the burn_disc object has to be disposed by burn_disc_free().
+    where the image was eventually loaded.
+    This call starts a libisofs thread which begins to produce the image.
+    It has to be revoked by isoburn_cancel_prepared_write() if for some reason
+    this image data stream shall not be consumed.
+    The returned struct burn_disc is ready for use by a subsequent call to
+    isoburn_disc_write(). After this asynchronous writing has ended and the
+    drive is BURN_DRIVE_IDLE again, the burn_disc object has to be disposed
+    by burn_disc_free().
     @since 0.1.0
     @param drive The combined source and target drive, grabbed with
                  isoburn_drive_scan_and_grab(). .
@@ -2083,13 +2087,16 @@ int isoburn_prepare_disc(struct burn_drive *drive, struct burn_disc **disc,
                          struct isoburn_imgen_opts *opts);
 
 
-/** To choose the expansion method of Modifying:
+/** Start production of an ISO 9660 image using the method of Modifying:
     Create a disc object for producing a new image from a previous image
     plus the changes made by user. The generated burn_disc is suitable
     to be written to a grabbed drive with blank writeable medium.
     But you must not use the same drive for input and output, because data
     will be read from the source drive while at the same time the target
     drive is already writing.
+    This call starts a libisofs thread which begins to produce the image.
+    It has to be revoked by isoburn_cancel_prepared_write() if for some reason
+    this image data stream shall not be consumed.
     The resulting burn_disc object has to be disposed when all its writing
     is done and the drive is BURN_DRIVE_IDLE again after asynchronous
     burn_disc_write().
@@ -2108,7 +2115,7 @@ int isoburn_prepare_new_image(struct burn_drive *in_drive,
                               struct burn_drive *out_drive);
 
 
-/** To choose the expansion method of Blind Growing:
+/** Start production of an ISO 9660 image using the method of Blind Growing:
     Create a disc object for writing an add-on session from the created or
     loaded IsoImage which has been manipulated via libisofs, to a different
     drive than the one from where it was loaded.
@@ -2122,6 +2129,9 @@ int isoburn_prepare_new_image(struct burn_drive *in_drive,
       $nwa  is a parameter of this call
             or can be used as detected from the in_drive medium
 
+    This call starts a libisofs thread which begins to produce the image.
+    It has to be revoked by isoburn_cancel_prepared_write() if for some reason
+    this image data stream shall not be consumed.
     This call waits for libisofs output to become available and then detaches
     the input drive object from the data source object by which libisofs was
     reading from the input drive.
diff --git a/xorriso/xorriso_timestamp.h b/xorriso/xorriso_timestamp.h
index 1f003cc5..f9950fa0 100644
--- a/xorriso/xorriso_timestamp.h
+++ b/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2013.08.07.141130"
+#define Xorriso_timestamP "2013.08.16.153701"