[library user]

There is a virus (a nasty one) associated with GreaseMonkey. Un-install immediately.

Actually it's not GreaseMonkey itself, it's something that masquerades as GreaseMonkey.

[numberonepal]

Actually it's not GreaseMonkey itself

Good point, but get rid of GreaseMonkey and re-install from the official Mozilla site if you MUST run the add-on. Besides, Fire Bug can accomplish many of the same goals as GreaseMonkey of you want to tinker with the way a designer intended the page to look.