Warning: Cannot modify header information – headers already sent

By searching for the error message. This is a common problem, the fix for which can be found through one of the first couple of links from search.

It’s whitespace. You can use search in Main_Page to find out how to fix it. I can’t tell you how to fix it, I’ve never had the problem.

Gonna have to bookmark that I guess *sigh* – though it’s not that hard to find….