CF logging out, with unexpected messages.

This past week, I went from over 500-pm's , down to 180-pm's total; with no problems.

Just now, clicking on a holiday-Reply I had saved, CF logged me out.
And after logging back in, got this message:
"Unable to add cookies, header already sent.
File: /var/www/html/includes/class_core.php Line: 3295"

Is that a Coding-error?

Hi SirAdrian

in the PM I mentioned above, was an "animated Flash card" on another site, that I clicked-on.

Funny thing is, I tried it, 3 more times just now, and it worked just fine. Weird, but nice
~

While you're reading here, I have another 2 challenges with PM's.
Am I to write out a seperate Report on each one?,
or do you just want me to include them in this Report?, even as they are seperate issues.

And THANK you! for your prompt attention, it is really appreciated