Originally Posted by mikeyt_333
Are there 403 errors in your logs that you can relate to the problem systems? Have you tried clearing browser cache?
Examples of the errors in the log:
80.xxx.xxx.xxx - - [15/May/2006:09:12:20 +0100] "GET / HTTP/1.1" 403 - "-" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)"
80.xxx.xxx.xxx - - [15/May/2006:13:43:22 +0100] "GET / HTTP/1.1" 403 - "-" "Mozilla/5.0 (Windows; U Windows NT 5.1; en-GB; rv:220.127.116.11) Gecko/20060426 Firefox/18.104.22.168"
The problem is nothing to do with browser caches. This problem relates to a whole physical site (office) not a single machine and is demonstrated on machines even on their first attempt to visit the site.