diff --git a/libisoburn/trunk/libisoburn/isoburn.c b/libisoburn/trunk/libisoburn/isoburn.c
index a706f981..9a70d189 100644
--- a/libisoburn/trunk/libisoburn/isoburn.c
+++ b/libisoburn/trunk/libisoburn/isoburn.c
@@ -413,6 +413,7 @@ int isoburn_prepare_disc_aux(struct burn_drive *in_d, struct burn_drive *out_d,
  iso_write_opts_set_allow_full_ascii(wopts, opts->allow_full_ascii);
  iso_write_opts_set_relaxed_vol_atts(wopts, 1);
  iso_write_opts_set_joliet_longer_paths(wopts, opts->joliet_longer_paths);
+ iso_write_opts_set_always_gmt(wopts, opts->always_gmt);
  iso_write_opts_set_sort_files(wopts, opts->sort_files);
  iso_write_opts_set_replace_mode(wopts, opts->replace_dir_mode,
                 opts->replace_file_mode, opts->replace_uid, opts->replace_gid);
@@ -773,6 +774,7 @@ int isoburn_igopt_new(struct isoburn_imgen_opts **new_o, int flag)
  o->allow_lowercase= 0;
  o->allow_full_ascii= 0;
  o->joliet_longer_paths= 0;
+ o->always_gmt= 0;
  o->sort_files= 0;
  o->replace_dir_mode= 0;
  o->replace_file_mode= 0;
@@ -782,7 +784,7 @@ int isoburn_igopt_new(struct isoburn_imgen_opts **new_o, int flag)
  o->file_mode= 0444;
  o->uid= 0;
  o->gid= 0;
- o->output_charset= 0;
+ o->output_charset= NULL;
  o->fifo_size= 4*1024*1024;
  o->effective_lba= -1;
  return(1);
@@ -839,6 +841,7 @@ int isoburn_igopt_set_relaxed(struct isoburn_imgen_opts *o, int relax)
  o->allow_lowercase= !!(relax&32);
  o->allow_full_ascii= !!(relax&64);
  o->joliet_longer_paths= !!(relax&128);
+ o->always_gmt= !!(relax&256);
  return(1);
 }
 
diff --git a/libisoburn/trunk/libisoburn/isoburn.h b/libisoburn/trunk/libisoburn/isoburn.h
index 21c18f76..abcb94ad 100644
--- a/libisoburn/trunk/libisoburn/isoburn.h
+++ b/libisoburn/trunk/libisoburn/isoburn.h
@@ -357,6 +357,11 @@ struct isoburn_imgen_opts {
      */
     unsigned int joliet_longer_paths :1;
 
+    /**
+     * Store timestamps as GMT rather than in local time.
+     */
+    unsigned int always_gmt :1;
+
     unsigned int sort_files:1;
                 /**< If files should be sorted based on their weight. */
 
diff --git a/libisoburn/trunk/libisoburn/libisoburn.h b/libisoburn/trunk/libisoburn/libisoburn.h
index 3939dddd..a39d6344 100644
--- a/libisoburn/trunk/libisoburn/libisoburn.h
+++ b/libisoburn/trunk/libisoburn/libisoburn.h
@@ -842,6 +842,13 @@ int isoburn_igopt_get_extensions(struct isoburn_imgen_opts *o, int *ext);
            bit7= joliet_longer_paths
                  Allow paths in the Joliet tree to have more than
                  240 characters.
+           bit8= always_gmt
+                 Write timestamps as GMT although the specs prescribe local
+                 time with eventual non-zero timezone offset. Negative
+                 timezones (west of GMT) can trigger bugs in some operating
+                 systems which typically appear in mounted ISO images as if
+                 the timezone shift from GMT was applied twice
+                 (e.g. in New York 22:36 becomes 17:36).
     @return 1 success, <=0 failure
 */
 #define isoburn_igopt_omit_version_numbers       1
@@ -852,6 +859,7 @@ int isoburn_igopt_get_extensions(struct isoburn_imgen_opts *o, int *ext);
 #define isoburn_igopt_allow_lowercase           32
 #define isoburn_igopt_allow_full_ascii          64
 #define isoburn_igopt_joliet_longer_paths      128
+#define isoburn_igopt_always_gmt               256
 int isoburn_igopt_set_relaxed(struct isoburn_imgen_opts *o, int relax);
 int isoburn_igopt_get_relaxed(struct isoburn_imgen_opts *o, int *relax);
 
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index 0372cbbc..c02f79f5 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2008.11.15.133724"
+#define Xorriso_timestamP "2008.11.15.231831"