ive got a domain with web forwarding enabled.
when you put the mouse over the page, it shows the actual URL of the page in a small yellow box (like the alt text for images).
How do i remove this, or stop it from happening?
can you link to an example?
Sounds like something the browser is doing as an anti-phishing measure.
You stop it from happening by switching to using an antiquated browser that has a huge number of security holes. Modern secure browsers all display that information either as a tooltip or in the status bar and do not allow web pages to turn it off.