diff --git a/libisoburn/trunk/xorriso/drive_mgt.c b/libisoburn/trunk/xorriso/drive_mgt.c
index 55a60f70..e92b4994 100644
--- a/libisoburn/trunk/xorriso/drive_mgt.c
+++ b/libisoburn/trunk/xorriso/drive_mgt.c
@@ -2768,7 +2768,7 @@ ex:;
  if(async_md5) {
    Xorriso__end_slave_md5(&state, 10000, 0);
    sprintf(xorriso->info_text,
-           "async_chunks=%d , chunk_size=%d , w_sleeps: %.f , r_sleeps: %.f",
+           "async_chunks=%d , chunk_size=%ds , w_sleeps: %.f , r_sleeps: %.f",
            state.num_chunks, read_chunk, (double) state.w_sleeps,
            (double) state.r_sleeps);
    Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "DEBUG", 0);
@@ -2790,7 +2790,7 @@ ex:;
 int Xorriso_check_media(struct XorrisO *xorriso, struct SpotlisT **spotlist,
                         struct CheckmediajoB *job, int flag)
 {
- int media_blocks= 0, read_chunk= 16, ret, mode, start_lba= 0;
+ int media_blocks= 0, read_chunk= 32, ret, mode, start_lba= 0;
  int blocks, os_errno, i, j, last_track_end= -1, track_blocks, track_lba;
  int num_sessions, num_tracks, declare_untested= 0, md5_start;
  int read_capacity= -1, end_lba, hret, count, quality, profile_no;
@@ -2816,8 +2816,7 @@ int Xorriso_check_media(struct XorrisO *xorriso, struct SpotlisT **spotlist,
  ret = burn_disc_get_profile(drive, &profile_no, profile_name);
  if(ret <= 0)
    profile_no= 0;
- if(profile_no >= 0x40 && profile_no <= 0x43) /* BD-ROM, BD-R, BD-RE */
-   read_chunk= 32;
+
  if(job->min_block_size != 0)
    read_chunk= job->min_block_size;
 
diff --git a/libisoburn/trunk/xorriso/xorriso.1 b/libisoburn/trunk/xorriso/xorriso.1
index cc10e607..1afaf7b2 100644
--- a/libisoburn/trunk/xorriso/xorriso.1
+++ b/libisoburn/trunk/xorriso/xorriso.1
@@ -9,7 +9,7 @@
 .\" First parameter, NAME, should be all caps
 .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 .\" other parameters are allowed: see man(7), man(1)
-.TH XORRISO 1 "Version 1.2.3, Mai 01, 2012"
+.TH XORRISO 1 "Version 1.2.3, Mai 02, 2012"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -3661,7 +3661,7 @@ This gets rounded down to full blocks of 2048 bytes. 0 means automatic size.
 \fBasync_chunks=number\fR
 enables asynchronous MD5 processing if number is 2 or larger.
 In this case the given number of read chunks is allocated as fifo buffer.
-On very fast MMC drives try: chunk_size=32s async_chunks=16.
+On very fast MMC drives try: chunk_size=64s async_chunks=16.
 .TP
 \fB\-check_md5\fR severity iso_rr_path [***]
 Compare the data content of the given files in the loaded image with their
diff --git a/libisoburn/trunk/xorriso/xorriso.info b/libisoburn/trunk/xorriso/xorriso.info
index 862f3b69..5635a78b 100644
--- a/libisoburn/trunk/xorriso/xorriso.info
+++ b/libisoburn/trunk/xorriso/xorriso.info
@@ -3227,7 +3227,7 @@ transmission errors.
     async_chunks=number
           enables asynchronous MD5 processing if number is 2 or larger.
           In this case the given number of read chunks is allocated as
-          fifo buffer.  On very fast MMC drives try: chunk_size=32s
+          fifo buffer.  On very fast MMC drives try: chunk_size=64s
           async_chunks=16.
      
 -check_md5 severity iso_rr_path [***]
diff --git a/libisoburn/trunk/xorriso/xorriso.texi b/libisoburn/trunk/xorriso/xorriso.texi
index 861c0aba..0b26581d 100644
--- a/libisoburn/trunk/xorriso/xorriso.texi
+++ b/libisoburn/trunk/xorriso/xorriso.texi
@@ -50,7 +50,7 @@
 @c man .\" First parameter, NAME, should be all caps
 @c man .\" Second parameter, SECTION, should be 1-8, maybe w/ subsection
 @c man .\" other parameters are allowed: see man(7), man(1)
-@c man .TH XORRISO 1 "Version 1.2.3, Mai 01, 2012"
+@c man .TH XORRISO 1 "Version 1.2.3, Mai 02, 2012"
 @c man .\" Please adjust this date whenever revising the manpage.
 @c man .\"
 @c man .\" Some roff macros, for reference:
@@ -4313,7 +4313,7 @@ This gets rounded down to full blocks of 2048 bytes. 0 means automatic size.
 @item async_chunks=number
 enables asynchronous MD5 processing if number is 2 or larger.
 In this case the given number of read chunks is allocated as fifo buffer.
-On very fast MMC drives try: chunk_size=32s async_chunks=16.
+On very fast MMC drives try: chunk_size=64s async_chunks=16.
 @end table
 @c man .TP
 @kindex -check_md5   verifies file checksum
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 810f5396..de509cc4 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2012.05.01.075022"
+#define Xorriso_timestamP "2012.05.02.111016"