Sudden 404 error on some menu pages

Hi

I hope I’m not broking any rules here… I’m trying to solve an issue that drives me crazy.

I suddenly noticed a few pages on my blog returned a 404 error page.

These pages do exist and the permalink hasn’t changed.

I tried resetting the permalinks, still get the error. Resetting the .htaccess file, didn’t work. Disabled all plugins, same.

Sometimes I get an error 404 page from my blog, and sometimes a cp_errordocument.shtml (port 443) page.

I feel like I suck describing the issue, I’m sorry. I’ve just spent an hour Googling around and trying a few fixes, but alas, nothing worked.

Any idea?

 

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