Clicking a link versus using the address bar

[eluser]andrewtheandroid[/eluser]
Just reading the description just to paraphrase, you click on the link and it works. you then copy and paste the url and put it directly into the browser and it does not work?

The only thing that springs to mind is the form validator of the receiving end is using GET data from the url. using the "?name=this&validation=that"

AFAIK when you click on a link there are is no hidden information.... unless the link is the submit for a form on that page and submits some hidden form fields. maybe there is some sort of javascript onclick submit a hidden form funny business going on?

have you looked at the source code of the page and checked if it contains a form?

Also you have comfirmed that the href="xxxx" is equal to the one you are pasting?

Sorry if the last two questions seem obvious you probably already have checked these but just in case (that's what i'd do).