Chrome Menu - Shift in submenu

[Ygglik]

Hello,
How to avoid a different shift in submenus depending on browser?
Can you "lock" the submenu under the begining of the item in the uppermenu ?

Like this example (see attachment)
Attachment 331

You can see a shift from (comment reserver? How to make reservation) to tarifs.

The Dynamic Drive link is http://www.dynamicdrive.com/dynamici...rome/index.htm.

Thanks