diff --git a/trunk/cdrskin/cdrskin_timestamp.h b/trunk/cdrskin/cdrskin_timestamp.h
index b496716f..506cc901 100644
--- a/trunk/cdrskin/cdrskin_timestamp.h
+++ b/trunk/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2006.10.07.170913"
+#define Cdrskin_timestamP "2006.10.07.175427"
diff --git a/trunk/libburn/async.c b/trunk/libburn/async.c
index e54a1dc0..fe40c5a1 100644
--- a/trunk/libburn/async.c
+++ b/trunk/libburn/async.c
@@ -250,6 +250,15 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
 			0, 0);
 		return;
 	}
+	/* ts A61007 : obsolete Assert in spc_select_write_params() */
+	if (!opts->drive->mdata->valid) {
+		libdax_msgs_submit(libdax_messenger,
+				opts->drive->global_index, 0x00020113,
+				LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
+				"Drive capabilities not inquired yet", 0, 0);
+		return;
+	}
+
 	o.drive = opts->drive;
 	o.opts = opts;
 	o.disc = disc;
diff --git a/trunk/libburn/libdax_msgs.h b/trunk/libburn/libdax_msgs.h
index b5b5b352..63490923 100644
--- a/trunk/libburn/libdax_msgs.h
+++ b/trunk/libburn/libdax_msgs.h
@@ -318,6 +318,8 @@ Range "scdbackup"          :  0x00020000 to 0x0002ffff
  0x00020110 (FATAL,HIGH)   = Persistent drive address too long
  0x00020111 (FATAL,HIGH)   = Could not allocate new auxiliary object
  0x00020112 (SORRY,HIGH)   = Bad combination of write_type and block_type
+ 0x00020113 (FATAL,HIGH)   = Drive capabilities not inquired yet
+
 
 ------------------------------------------------------------------------------
 
diff --git a/trunk/libburn/spc.c b/trunk/libburn/spc.c
index 4396002d..c44fc813 100644
--- a/trunk/libburn/spc.c
+++ b/trunk/libburn/spc.c
@@ -202,7 +202,10 @@ void spc_select_error_params(struct burn_drive *d,
 	c.page = &buf;
 	c.page->bytes = 0;
 	c.page->sectors = 0;
-	assert(d->mdata->valid);
+
+	/* ts A61007 : moved up to only caller burn_disc_read() */
+	/* a ssert(d->mdata->valid); */
+
 	memset(c.page->data, 0, 8 + 2 + d->mdata->retry_page_length);
 	c.page->bytes = 8 + 2 + d->mdata->retry_page_length;
 	c.page->data[8] = 1;
@@ -227,8 +230,9 @@ void spc_sense_write_params(struct burn_drive *d)
 	unsigned char *page;
 	struct command c;
 
-	assert(d->mdata->cdr_write || d->mdata->cdrw_write ||
-	       d->mdata->dvdr_write || d->mdata->dvdram_write);
+	/* ts A61007 : Done in soft at only caller burn_drive_grab() */
+	/* a ssert(d->mdata->cdr_write || d->mdata->cdrw_write ||
+	       d->mdata->dvdr_write || d->mdata->dvdram_write); */
 
 	memcpy(c.opcode, SPC_MODE_SENSE, sizeof(SPC_MODE_SENSE));
 	c.retry = 1;
@@ -256,7 +260,9 @@ void spc_select_write_params(struct burn_drive *d,
 	struct command c;
 	int bufe, sim;
 
-	assert(o->drive == d);
+	/* ts A61007 : All current callers are safe. */
+	/* a ssert(o->drive == d); */
+
 	memcpy(c.opcode, SPC_MODE_SELECT, sizeof(SPC_MODE_SELECT));
 	c.retry = 1;
 	c.oplen = sizeof(SPC_MODE_SELECT);
@@ -264,7 +270,10 @@ void spc_select_write_params(struct burn_drive *d,
 	c.page = &buf;
 	c.page->bytes = 0;
 	c.page->sectors = 0;
-	assert(d->mdata->valid);
+
+	/* ts A61007 : moved up to burn_disc_write() */
+	/* a ssert(d->mdata->valid); */
+
 	memset(c.page->data, 0, 8 + 2 + d->mdata->write_page_length);
 	c.page->bytes = 8 + 2 + d->mdata->write_page_length;
 	c.page->data[8] = 5;