diff --git a/libisoburn/trunk/libisoburn/isofs_wrap.c b/libisoburn/trunk/libisoburn/isofs_wrap.c
index 4ee8c765..58e98748 100644
--- a/libisoburn/trunk/libisoburn/isofs_wrap.c
+++ b/libisoburn/trunk/libisoburn/isofs_wrap.c
@@ -200,6 +200,11 @@ int isoburn_read_image(struct burn_drive *d,
  iso_read_opts_set_default_uid(ropts, read_opts->uid);
  iso_read_opts_set_default_gid(ropts, read_opts->gid);
  iso_read_opts_set_input_charset(ropts, read_opts->input_charset);
+
+ /* <<< experimental API call of libisofs
+ iso_read_opts_set_error_behavior(ropts, 1);
+ */
+
  ds = isoburn_data_source_new(d);
  iso_image_attach_data(o->image, o->read_pacifier_handle,
                        isoburn_idle_free_function);
diff --git a/libisoburn/trunk/xorriso/xorriso.1 b/libisoburn/trunk/xorriso/xorriso.1
index 771c1f1f..af6878ca 100644
--- a/libisoburn/trunk/xorriso/xorriso.1
+++ b/libisoburn/trunk/xorriso/xorriso.1
@@ -2,7 +2,7 @@
 .\" 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 "April, 3, 2008"
+.TH XORRISO 1 "May, 1, 2008"
 .\" Please adjust this date whenever revising the manpage.
 .\"
 .\" Some roff macros, for reference:
@@ -212,7 +212,8 @@ Growing is achieved by option -dev.
 The write method of \fBmodifying\fR produces compact filesystem
 images with no outdated files or directory trees. Modifying can write its
 images to target media which are completely unsuitable for multi-session
-operations. E.g. fast blanked DVD-RW, named pipes, character devices, sockets.
+operations. E.g. DVD-RW which were treated with -blank deformat_quickest,
+named pipes, character devices, sockets.
 On the other hand modified sessions cannot be written to appendable media
 but to blank media only.
 .br
@@ -285,7 +286,7 @@ among the start arguments. Do not try to fool this ban via backdoor addresses
 to stdout.
 .br
 If stdout is used as drive, then -use_readline is permanently disabled.
-Use of backdoors will cause severe memory and/or terminal corruption.
+Use of backdoors will cause severe memory and/or tty corruption.
 .PP
 Be aware that especially the superuser can write into any accessible file or
 device by using its path with the "stdio:" prefix. Addresses without prefix
@@ -1183,6 +1184,21 @@ A special property of this option is that the first -report_about setting
 among the start arguments is in effect already when the first operations
 of xorriso begin. Only "-report_about" with dash "-" is recognized that way.
 .TP
+\fB\-error_behavior\fR occasion behavior
+Control the program behavior at problem event occasions.
+.br
+For now this applies only to occasion "image_loading" which is given while
+an image tree is read from the input device. There are three behaviors
+available:
+.br
+"best_effort" goes on with reading after events with severity below FAILURE
+.br
+"failure" aborts image tree reading on first event of at least SORRY.
+It issues an own FAILURE event.
+.br
+"fatal" acts like "failure" but issues the own event as FATAL.
+This is the default.
+.TP
 .B Dialog mode control:
 .TP
 \fB\-dialog\fR "on"|"off"
diff --git a/libisoburn/trunk/xorriso/xorriso.c b/libisoburn/trunk/xorriso/xorriso.c
index 67bc3aef..97081310 100644
--- a/libisoburn/trunk/xorriso/xorriso.c
+++ b/libisoburn/trunk/xorriso/xorriso.c
@@ -2445,6 +2445,7 @@ int Xorriso_new(struct XorrisO ** xorriso,char *progname, int flag)
  m->problem_status_text[0]= 0;
  m->errfile_log[0]= 0;
  m->errfile_fp= NULL;
+ m->img_read_error_mode= 2;         /* abort faulty image reading with FATAL */
  strcpy(m->return_with_text, "SORRY");
  Xorriso__text_to_sev(m->return_with_text, &m->return_with_severity, 0);
  m->return_with_value= 32;
@@ -3537,6 +3538,16 @@ int Xorriso_status(struct XorrisO *xorriso, char *filter, FILE *fp, int flag)
  if(!(is_default && no_defaults))
    Xorriso_status_result(xorriso,filter,fp,flag&2);
 
+ is_default= (xorriso->img_read_error_mode==2);
+ treatment= "best_effort";
+ if(xorriso->img_read_error_mode==1)
+   treatment= "failure";
+ else if(xorriso->img_read_error_mode==2)
+   treatment= "fatal";
+ sprintf(line,"-error_behavior image_loading %s\n", treatment);
+ if(!(is_default && no_defaults))
+   Xorriso_status_result(xorriso,filter,fp,flag&2);
+
  is_default= (xorriso->mark_text[0]==0);
  sprintf(line,"-mark %s\n",Text_shellsafe(xorriso->mark_text,sfe,0));
  if(!(is_default && no_defaults))
@@ -8224,6 +8235,34 @@ int Xorriso_option_errfile_log(struct XorrisO *xorriso,
 }
 
 
+/* Option -error_behavior */
+int Xorriso_option_error_behavior(struct XorrisO *xorriso,
+                                  char *occasion, char *behavior, int flag)
+{
+ if(strcmp(occasion, "image_loading")==0) {
+   if(strcmp(behavior, "best_effort")==0)
+     xorriso->img_read_error_mode= 0;
+   else if(strcmp(behavior, "failure")==0 || strcmp(behavior, "FAILURE")==0)
+     xorriso->img_read_error_mode= 1;
+   else if(strcmp(behavior, "fatal")==0 || strcmp(behavior, "FATAL")==0)
+     xorriso->img_read_error_mode= 2;
+   else {
+     sprintf(xorriso->info_text,
+             "-error_behavior: with 'image_loading': unknown behavior '%s'",
+             behavior);
+     Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+     return(0);
+   }
+ } else {
+   sprintf(xorriso->info_text, "-error_behavior: unknown occasion '%s'",
+           occasion);
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   return(0);
+ }
+ return(1);
+}
+
+
 /* Option -follow */
 int Xorriso_option_follow(struct XorrisO *xorriso, char *mode, int flag)
 {
@@ -10336,6 +10375,10 @@ next_command:;
    (*idx)+= 2;
     ret= Xorriso_option_errfile_log(xorriso, arg1, arg2, 0);
 
+ } else if(strcmp(cmd,"error_behavior")==0) {
+   (*idx)+= 2;
+   ret= Xorriso_option_error_behavior(xorriso, arg1, arg2, 0);
+
  } else if(strcmp(cmd,"iso_rr_pattern")==0) {
    (*idx)++;
    ret= Xorriso_option_iso_rr_pattern(xorriso, arg1, 0);
diff --git a/libisoburn/trunk/xorriso/xorriso.h b/libisoburn/trunk/xorriso/xorriso.h
index a4db462c..6e7aa83c 100644
--- a/libisoburn/trunk/xorriso/xorriso.h
+++ b/libisoburn/trunk/xorriso/xorriso.h
@@ -268,6 +268,14 @@ int Xorriso_option_eject(struct XorrisO *xorriso, char *which, int flag);
 */
 int Xorriso_option_end(struct XorrisO *xorriso, int flag);
 
+/* Option -errfile_log marked|plain  path|-|"" */
+int Xorriso_option_errfile_log(struct XorrisO *xorriso,
+                               char *mode, char *path, int flag);
+
+/* Option -error_behavior */
+int Xorriso_option_error_behavior(struct XorrisO *xorriso, 
+                                  char *occasion, char *behavior, int flag);
+
 /* Option -iso_rr_pattern "on"|"ls"|"off" */
 int Xorriso_option_iso_rr_pattern(struct XorrisO *xorriso, char *mode,
                                   int flag);
diff --git a/libisoburn/trunk/xorriso/xorriso_private.h b/libisoburn/trunk/xorriso/xorriso_private.h
index a24ed7cd..ce753b6e 100644
--- a/libisoburn/trunk/xorriso/xorriso_private.h
+++ b/libisoburn/trunk/xorriso/xorriso_private.h
@@ -184,6 +184,8 @@ struct XorrisO { /* the global context of xorriso */
  int errfile_mode; /* bit0= marked */
  FILE *errfile_fp;
 
+ int img_read_error_mode; /* 0=best_effort , 1=failure , 2=fatal */
+
  char return_with_text[20];
  int return_with_severity;
  int return_with_value;
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 2d640de6..a231a62a 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2008.04.28.122244"
+#define Xorriso_timestamP "2008.05.01.124248"
diff --git a/libisoburn/trunk/xorriso/xorrisoburn.c b/libisoburn/trunk/xorriso/xorrisoburn.c
index 73916902..a4e76fe1 100644
--- a/libisoburn/trunk/xorriso/xorrisoburn.c
+++ b/libisoburn/trunk/xorriso/xorrisoburn.c
@@ -506,7 +506,7 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
  enum burn_disc_status state;
  IsoImage *volset = NULL;
  struct isoburn_read_opts *ropts= NULL;
- char adr_data[SfileadrL], *libburn_adr, *boot_fate;
+ char adr_data[SfileadrL], *libburn_adr, *boot_fate, *sev;
 
  if((flag&3)==0) { 
    sprintf(xorriso->info_text, 
@@ -625,11 +625,32 @@ int Xorriso_aquire_drive(struct XorrisO *xorriso, char *adr, int flag)
  Xorriso_set_image_severities(xorriso, 1); /* No DEBUG messages */
  Xorriso_pacifier_reset(xorriso, 0);
  isoburn_set_read_pacifier(drive, Xorriso__read_pacifier, (void *) xorriso);
- if(isoburn_read_image(drive, ropts, &volset) <= 0) {
+
+ /* <<< Trying to work around too much tolerance on bad image trees.
+        Better would be a chance to instruct libisofs what to do in
+        case of image read errors. There is a risk to mistake other SORRYs.
+ */
+ if(xorriso->img_read_error_mode>0)
+   iso_set_abort_severity("SORRY");
+
+ ret= isoburn_read_image(drive, ropts, &volset);
+
+ /* <<< Resetting to normal thresholds */
+ if(xorriso->img_read_error_mode>0)
+   Xorriso_set_abort_severity(xorriso, 0);
+
+ if(ret<=0) {
    Xorriso_process_msg_queues(xorriso,0);
    Xorriso_set_image_severities(xorriso, 0);
-   sprintf(xorriso->info_text,"Cannot read ISO image volset");
-   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, "FAILURE", 0);
+   Xorriso_give_up_drive(xorriso, 1);
+   sprintf(xorriso->info_text,"Cannot read ISO image tree");
+   sev= "FAILURE";
+   if(xorriso->img_read_error_mode==2)
+     sev= "FATAL";
+   Xorriso_msgs_submit(xorriso, 0, xorriso->info_text, 0, sev, 0);
+   if(xorriso->img_read_error_mode!=0)
+     Xorriso_msgs_submit(xorriso, 0, "You might get a partial or altered ISO image tree by option -error_behavior 'image_loading' 'best_effort'",
+                         0, "HINT", 0);
    ret= 3; goto ex;
  }
  Xorriso_pacifier_callback(xorriso, "nodes read", xorriso->pacifier_count, 0,
@@ -4397,21 +4418,23 @@ int Xorriso_set_publisher(struct XorrisO *xorriso, char *name, int flag)
 /* @param flag bit0=prepare for a burn run */
 int Xorriso_set_abort_severity(struct XorrisO *xorriso, int flag)
 {
- int ret;
+ int ret, abort_on_number;
+ char *sev_text;
+ static int note_number= -1, failure_number= -1;
 
- /* ??? <<< On MISHAP use FAILURE as abort severity known to libisofs.
-        On ERRFILE use NEVER.
-        The pacifier loop will care for canceling libburn on MISHAP
-        and thus also cancel the image generation.
-        with libisofs-0.6.4 this should not be necessary
-        Shall it be uphold anyway ?
- */
- if((flag&1) && strcmp(xorriso->abort_on_text, "MISHAP")==0)
-   ret= iso_set_abort_severity("FAILURE");
- else if((flag&1) && strcmp(xorriso->abort_on_text, "ERRFILE")==0)
-   ret= iso_set_abort_severity("NEVER");
- else
-   ret= iso_set_abort_severity(xorriso->abort_on_text);
+ if(note_number==-1)
+   Xorriso__text_to_sev("NOTE", &note_number, 0);
+ if(failure_number==-1)
+   Xorriso__text_to_sev("FAILURE", &failure_number, 0);
+ sev_text= xorriso->abort_on_text;
+ ret= Xorriso__text_to_sev(xorriso->abort_on_text, &abort_on_number, 0);
+ if(ret<=0)
+   return(ret);
+ if(abort_on_number<note_number)
+   sev_text= "NOTE";
+ else if(abort_on_number>failure_number)
+   sev_text= "FAILURE";
+ ret= iso_set_abort_severity(sev_text);
  return(ret>=0);
 }