diff -up cups-1.4b1/cups/http.c.wbuffer cups-1.4b1/cups/http.c
--- cups-1.4b1/cups/http.c.wbuffer	2008-08-20 01:07:25.000000000 +0100
+++ cups-1.4b1/cups/http.c	2008-11-12 09:13:29.000000000 +0000
@@ -2166,7 +2166,7 @@ httpWrite2(http_t     *http,		/* I - Con
 
   if (length > 0)
   {
-    if (http->wused && (length + http->wused) > sizeof(http->wbuffer))
+    if (http->wused && (length + http->wused) >= sizeof(http->wbuffer))
     {
       DEBUG_printf(("httpWrite2: Flushing buffer (wused=%d, length="
                     CUPS_LLFMT ")\n", http->wused, CUPS_LLCAST length));