--- encoder/slicetype.c.old	2010-10-25 09:32:01 +0900
+++ encoder/slicetype.c	2010-10-25 09:35:26 +0900
@@ -1083,8 +1083,6 @@
     if( h->param.b_deterministic )
         i_max_search = X264_MIN( i_max_search, h->lookahead->i_slicetype_length + !keyframe );
 
-    assert( h->frames.b_have_lowres );
-
     if( !h->lookahead->last_nonb )
         return;
     frames[0] = h->lookahead->last_nonb;