FF3 + Firebug Bug

Seems Firefox 3 in combination with addon FireBug does not play well together when loading and using xml. It is not possible to get into any element in the xml. The only option possible was to disable FireBug completely to get the script working. FireBug is one of the bets addons to FireFox and almost everyone at work has that one installed. What a bummer we cant use it on the web application we are developing.