IE users not being able to login to PHP built site

IE users didn't have login trouble till recently - Netscape works though.

[seofan]

A few weeks ago, some of our members started reported not being able to login with IE. I have XP and get automatic updates.

I used to be able to login using IE. I found that I now can not login using IE, but can login to members section using Netscape. The site is built in PHP and the site files have not changed.

Anyone else experiencing this type of problem with IE? I've already tried accepting ALL cookies, activex settings are on, dumping cookies, temp files, security setting is LOW.

[sun818]

Browser does not care what scripting language generates the HTML. It is still HTML that is being served. Is there a browser validation/check going on? If you compare the HTML, is it the same on both browsers? Did you check external files like JavaScript, CSS, etc as well?