Hi Litespeed, We are running vbulletin 3.8.7 on litepseed. Some of our vbulletin users are getting '400 bad request' errors especially on firefox. '400 Bad Request It is not a valid request!' I looked in the server log and I see the errors are because the cookies are too long. So I have told the users to clear their cookies and it works for a bit, but then it will start happening again after a while. I personally never seem to get this error because I am clearing my cookies all the time anyway, but other people in the office are getting it so I know its true. We are using litespeed instead of apache and swapped over a couple months ago because our board is pretty large and the server wasn't handling the number of connections. Our Litespeed 'Max Request Header Size' setting is 16k, which is the 'hard' limit, so I suppose we can't make it larger - is that correct? Is there a way to affect litespeed so that it will accept larger cookies?