This is the patch from
http://sourceforge.net/tracker/?func=detail&aid=1908776&group_id=64301&atid=506989
to fix a crash when switching to full screen.
diff -up tvtime/src/xfullscreen.c.fsbadval tvtime/src/xfullscreen.c
--- tvtime/src/xfullscreen.c.fsbadval	2008-03-06 15:17:11.000000000 +0100
+++ tvtime/src/xfullscreen.c	2008-03-06 15:18:21.000000000 +0100
@@ -263,6 +263,10 @@ void xfullscreen_get_position( xfullscre
         int max_area = -1;
         int i;

+        *x = xf->heads[ 0 ].x;
+        *y = xf->heads[ 0 ].y;
+        *w = xf->heads[ 0 ].w;
+        *h = xf->heads[ 0 ].h;
         for( i = 0; i < xf->nheads; i++ ) {
             int head_x1 = xf->heads[ i ].x;
             int head_x2 = xf->heads[ i ].x + xf->heads[ i ].w - 1;