robzilla - 11:34 pm on Nov 7, 2013 (gmt 0)
That would never show up as a browser error message anyway. The browser only knows that it made a request which wasn't fulfilled, or attempted an action that it didn't complete. An SSI by definition happens without the browser's knowledge; any error message will be embedded in the page's html.
It would, actually, and I think SRegal wasn't referring to a browser warning (correct me if I'm wrong) but rather to an error notice that appears at the bottom of the page (hence all browsers showing the same error). Furthermore, this is a common error message for Server Side Include issues. See Apache.org on SSI [httpd.apache.org]:
Usually, when something goes wrong with your SSI directive, you get the message
[an error occurred while processing this directive]
SRegal, what's actually happening, or supposed to happen, at the bottom of the page where the error appears? Anything in your source code at that location?
If you're not using SSI, then perhaps you're embedding something that is?