diff --git a/libisoburn/trunk/xorriso/drive_mgt.c b/libisoburn/trunk/xorriso/drive_mgt.c
index 4be238c9..7644b5a9 100644
--- a/libisoburn/trunk/xorriso/drive_mgt.c
+++ b/libisoburn/trunk/xorriso/drive_mgt.c
@@ -2115,6 +2115,8 @@ int Xorriso_check_interval(struct XorrisO *xorriso, struct SpotlisT *spotlist,
  char *comparison= "", *sev_text= "DEBUG", *tag_type_name= "";
 
  Xorriso_alloc_meM(data, char, 64*1024);
+ if(read_chunk > 32)
+   read_chunk= 32;
 
  ret= Xorriso_get_drive_handles(xorriso, &dinfo, &drive,
                                 "on attempt to check media readability",
diff --git a/libisoburn/trunk/xorriso/xorriso_timestamp.h b/libisoburn/trunk/xorriso/xorriso_timestamp.h
index b76d2c76..b35d68d0 100644
--- a/libisoburn/trunk/xorriso/xorriso_timestamp.h
+++ b/libisoburn/trunk/xorriso/xorriso_timestamp.h
@@ -1 +1 @@
-#define Xorriso_timestamP "2012.01.21.173229"
+#define Xorriso_timestamP "2012.01.21.190312"