alt + mmb pan in 3ds max bug

[Olli.]

alright so i just downloaded the trial of 3ds max 2011, and im getting a weird bug with alt + middle mouse button to pan.
first i press down MMB to move around the viewport, then when i press alt because i want to pan, it kind of cancels my MMB hold-down and acts as if i had just pressed alt alone (it selects the edit dropdown menu on the top)

this pretty much destroys my workflow.. cant work like this.

previously ive used 3ds max 9, where alt + mmb pan works flawlessly, but thats a bit outdated tech so itd be nice to upgrade.