Novell BorderManager 3.8 Support Pack 4
PROXY.NLM version 5.00.23 from June 19 2006
After a period of time, within 2 to 7 days, depending on the server load, pages do not load anymore or are only partially displayed. Most often the images are the ones missing. Hitting refresh on the browser several times will finally load the page. This issue is typically experienced with Firefox as Firefox is using the HTTP 1.1 protocol through proxy by default.
This is fixed in proxy version 5.10.02, dated 16 october 2006 , included in BM38SP5_BETA2.EXE support pack and above.
Make sure as well that your proxy.cfg contains this entry under the [extra configuration] section: