Javascript Problem With Firefox 3.0

[Graham Todd]

Whenever I run Firefox, I get the following Javascript error message:

[Exception... "Component returned failure code: 0x80570016
(NS_ERROR_XPC_GS_RETURNED_FAILURE) [nsIJSCID.getService]"  nsresult:
"0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE)"  location: "JS frame ::
chrome://speeddial/content/speeddialOverlay.js :: anonymous :: line
1017"  data: no]

What does it mean and what should I do to correct it?

-- 
Graham Todd