Well for the life of me i can't figure out whats happened?? if you click on the link you gave me it takes me to your forum and your menu.
The time shown on your forum is All times are GMT. The time now is 09:50 PM. which is what the time is here in the UK.
In all the menu Installations i've done i've not had any problems like this before
Is it just in the testing Default theme that its like this??? Have you tried any other styles???
Are you still seeing a blank screen apart from the header and footer???