Fatal error: Nesting level too deep - recursive dependency?

[karlyn]

Lately, I'm getting this message..

"Fatal error: Nesting level too deep - recursive dependency? in /home/happy2/public_html/global.php on line 237"

I didn't make any changes, and the message seems to be sporadic.
I don't know what it means and could not find it here using search.
If you have any suggestions on what it is, why I'm seeing it, what I can do - it's appreciated.

My gallery: http://www.happy2create.com/

Thank you.

[karlyn]

I think this is a hosting issue possibly, because I'm seeing it on a couple of other sites of mine