This reminds me ever so slightly of a quote that someone had in the SBS newsgroup once upon a time .... "What rock did you crawl out from under?" There's a hotfix in the works. You can search this list and see the threads and comments. It's Sun and Delta's crappy coders that is the 'bug'. > There seems to be a bug in the Service Pack 2 for ISA server 2K4. > > I get errors when launching some websites. The issue disappears when SP2 > is not installed. > > For example, when I go to www.sun.com, the images don't load at all. When > I go to www.delta.com, I get the following error page from the ISA server: > > Error Code: 502 Proxy Error. The HTTP request includes a non-supported > header. Contact your ISA Server administrator. (12156) > > I did a lot of searching through the web and there were some workarounds > provided, which did not work at all. > > If there's some setting that can be tweaked in order to have ISA allow > these sites, then I would appreciate any help. > > Thanks.