diff --git a/libisoburn/trunk/libisoburn/isoburn.c b/libisoburn/trunk/libisoburn/isoburn.c
index 2907cc91..5bc40549 100644
--- a/libisoburn/trunk/libisoburn/isoburn.c
+++ b/libisoburn/trunk/libisoburn/isoburn.c
@@ -355,9 +355,8 @@ int isoburn_msgs_submit(struct isoburn *o, int error_code, char msg_text[],
 }
 
 
-/* TWINTREE: 
-   Check whether size of target_iso_head matches partition offset.
-   Eventually adjust size.
+/** Check whether the size of target_iso_head matches the given partition 
+    offset. Eventually adjust size.
 */
 int isoburn_adjust_target_iso_head(struct isoburn *o,
                                    uint32_t offst, int flag)
diff --git a/libisoburn/trunk/libisoburn/isoburn.h b/libisoburn/trunk/libisoburn/isoburn.h
index 2ca76e07..d301c023 100644
--- a/libisoburn/trunk/libisoburn/isoburn.h
+++ b/libisoburn/trunk/libisoburn/isoburn.h
@@ -38,7 +38,6 @@ int isoburn_toc_entry_destroy(struct isoburn_toc_entry **o, int flag);
 
 /* Minimal size of target_iso_head which is to be written during
    isoburn_activate_session().
-   TWINTREE:
    Within this size there is everything that is needed for image access with
    no partition offset. The actual target_iso_head buffer must be larger by
    the evential partition offset.
@@ -253,9 +252,8 @@ isoburn_data_source_new(struct burn_drive *d);
 int isoburn_data_source_shutdown(IsoDataSource *src, int flag);
 
 
-/** TWINTREE:
-    Check whether size of target_iso_head matches offset.
-    Eventually adjust size.
+/** Check whether the size of target_iso_head matches the given partition
+    offset. Eventually adjust size.
 */
 int isoburn_adjust_target_iso_head(struct isoburn *o,
                                    uint32_t offst, int flag);
@@ -537,15 +535,14 @@ struct isoburn_imgen_opts {
        and timezone 0 */
     char vol_uuid[17];
 
-    /* TWINTREE: The number of unclaimed 2K blocks before
-                 start of partition 1 as of the MBR in system area.
-                 If not 0 this will cause double volume descriptor sets
-                 and double tree.
+    /* The number of unclaimed 2K blocks before start of partition 1 as of
+       the MBR in system area. If not 0 this will cause double volume
+       descriptor sets and double tree.
     */
     uint32_t partition_offset;
-    /* TWINTREE: Partition table parameter: 1 to 63, 0= disabled/default */
+    /* Partition table parameter: 1 to 63, 0= disabled/default */
     int partition_secs_per_head; 
-    /* TWINTREE: 1 to 255, 0= disabled/default */
+    /* 1 to 255, 0= disabled/default */
     int partition_heads_per_cyl;
 
 };
@@ -584,9 +581,8 @@ struct isoburn_imgen_opts {
    In this case, no copy of the session  1 header is maintained and no TOC
    will be possible. Thus writing begins sequentially at LBA 0.
 
-   TWINTREE:
-   This macro gives the minimal size of an image header. It has to be
-   enlarged by the eventual partition offset.
+   IMPORTANT: This macro gives the minimal size of an image header. 
+              It has to be enlarged by the eventual partition offset.
 */
 #define Libisoburn_overwriteable_starT \
                                    ((off_t) (Libisoburn_target_head_sizE/2048))
diff --git a/libisoburn/trunk/libisoburn/isofs_wrap.c b/libisoburn/trunk/libisoburn/isofs_wrap.c
index fd9a990f..7e6164c1 100644
--- a/libisoburn/trunk/libisoburn/isofs_wrap.c
+++ b/libisoburn/trunk/libisoburn/isofs_wrap.c
@@ -305,8 +305,7 @@ int isoburn_activate_session(struct burn_drive *drive)
 }
 
 
-/** TWINTREE:
-    API @since 0.6.2
+/** API @since 0.6.2
 */
 int isoburn_get_img_partition_offset(struct burn_drive *drive,
                                      uint32_t *block_offset_2k)
@@ -327,8 +326,7 @@ int isoburn_get_img_partition_offset(struct burn_drive *drive,
 }
 
 
-/* TWINTREE:
-   Check for MBR signature and a first partition that starts at a 2k block 
+/* Check for MBR signature and a first partition that starts at a 2k block 
    and ends where the image ends.
    If not too large or too small, accept its start as partition offset.
 */
diff --git a/libisoburn/trunk/libisoburn/libisoburn.h b/libisoburn/trunk/libisoburn/libisoburn.h
index 7ab8aab2..27e73d6a 100644
--- a/libisoburn/trunk/libisoburn/libisoburn.h
+++ b/libisoburn/trunk/libisoburn/libisoburn.h
@@ -1222,21 +1222,17 @@ int isoburn_igopt_set_system_area(struct isoburn_imgen_opts *o,
 int isoburn_igopt_get_system_area(struct isoburn_imgen_opts *o,
                                   char data[32768], int *options);
 
-/** >>> TWINTREE : Under Construction.
-                   Do not use yet for multi-session
-
- Control production of a second set of volume descriptors (ISO 9660 superblock)
- and directory trees, together with a partition table entry in the MBR which
- has non-zero start address.
- The second volume descriptor set and trees will allow to mount the ISO image
- at the start of the first partition, while it is still possible to mount it
- via the normal fist volume descriptor set and tree at the start of the device.
- This makes few sense on optical media. Nevertheless it creates a conventional
- partition table on USB sticks which then are mountable on Linux via /dev/sdb
- and /dev/sdb1 alike.
-
- >>> Not combinable with multi-session yet.
-
+/** Control production of a second set of volume descriptors (superblock)
+    and directory trees, together with a partition table in the MBR where the
+    first partition has non-zero start address and the others are zeroed.
+    The first partition stretches to the end of the whole ISO image.
+    The additional volume descriptor set and trees will allow to mount the
+    ISO image at the start of the first partition, while it is still possible
+    to mount it via the normal first volume descriptor set and tree at the
+    start of the image resp. storage device.
+    This makes few sense on optical media. But on USB sticks it creates a
+    conventional partition table which makes it mountable on e.g. Linux via
+    /dev/sdb and /dev/sdb1 alike.
     @since 0.6.2
     @param opts
            The option set to be manipulated.
@@ -1361,8 +1357,7 @@ int isoburn_set_read_pacifier(struct burn_drive *drive,
                               int (*read_pacifier)(IsoImage*, IsoFileSource*),
                               void *app_handle);
 
-/** TWINTREE:
-    Inquire the partition offset of the loaded image. The first 512 bytes of
+/** Inquire the partition offset of the loaded image. The first 512 bytes of
     the image get examined whether they bear an MBR signature and a first
     partition table entry which matches the size of the image. In this case
     the start address is recorded as partition offset and internal buffers
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 8211f7f8..729856e3 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2010.09.10.171223"
+#define Xorriso_timestamP "2010.09.11.125002"