diff -u -d -r1.57 channel.cpp
--- libs/libmythtv/channel.cpp	5 Dec 2003 01:05:35 -0000	1.57
+++ libs/libmythtv/channel.cpp	14 Dec 2003 03:23:30 -0000
@@ -342,6 +342,9 @@
     QString freqid = query.value(1).toString();
     QString tvformat = query.value(2).toString();
 
+    if (tvformat.isNull() || tvformat.isEmpty())
+        tvformat = "Default";
+
     pthread_mutex_unlock(&db_lock);
 
     // Tune