Can you confirm the version of wp your using.
Provide a link to the site so that we can see the problem ourselves. No need to give us a login, just the URL.
Most of the time, the cookie error is a symptom of a deeper underlying problem.
Your wp-login page is showing a blank line before the doctype. This means that you have a blank line somewhere in the code that you need to remove. It could be in a plugin, it could be in the wp-config file, whatever, but somewhere there is an extra blank line. That blank line is blocking the cookies. Find it, eliminate it.
I’ve been rather slow to fix this (I’ll blame it on the fact that I’m travelling at the moment) but Otto was absolutely correct. I was too lazy to check get rid of every blank line in my plugin files however and therefore just deleted them :p.
I just updated to 2.3.3 and I’m still have the same cookie error problem. I’ve tried many things, but none of them have worked. Many suggestions involve deleting blank lines. I see a lot of blank lines in all my files. I’m sure I don’t understand what is meant by a “blank line”
I’ve tried commenting out the three lines people suggest.
I’ve tried using Opera, a different computer, and so on.
In addition I have no problem logging in during the daytime, usually, but just no luck early morning or late night. The times seem rather standard (10AM to 10PM I can log in without the error), which makes me think it’s related to something on my system, or related to my hosting service (fatcow).
What gives? I’m a bit at the end of my rope.
~alex
