[TYPO3] Cannot connect to current Database

[Tom Coady]

I'm seeing "cannot connect to database" error messages with increasing
frequency since adding favicon to the template - I think i'll take it out to
see if that makes any difference. It seems to happen randomly or every other
page.
More information here: http://rococochocolates.com/error.html

Also I did not know until now that there was an embargo on PNG images - I
have made a not of that error also on the same page for anyone who's
interested. - http://rococochocolates.com/error.html

Thanks for anyone who can suggest a solution!
best wishes
Tom