Apologies if this is in the wrong thread...

I'm running Google site speed checker on my site and the following issue is flagged:

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Specify a character set
Specifying a character set early for your HTML documents allows the browser to begin executing scripts immediately.

Suggestions for this page
The following resources have no character set specified in their HTTP headers. Specifying a character set in HTTP headers can speed up browser rendering.
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I have the follwoing in my page head:

HTML Code:
<!doctype html>  
<html lang="en">  
<head>  
<meta charset="utf-8">
...so what am I missing?