Extract from this website :
http://jpspanzers.yuku.com/topic/877?l=1
"Novgorod: Grand-daddy of them all! Here is where many new players find a Loss on the first turn. Not only is the terrain of Novgorod difficult to manage while playing the scenario, but it also hides many initial deployment hexes, some of which are absolutely critical to making it to the second turn of the scenario! One temporary deployment hex is the city of Starraya Russa itself -- a German Victory Hex.
If you do not deploy a unit here, the Russians will take that city and win the scenario on their first turn! You MUST deploy some units on temporary deployment hexes before you close the initial deployment window if you want to hold this city and make it past the first turn without an automatic loss!
With this map it is critical that you scan the whole map prior to deployment because of all the small clusters and individual temporary deployment hexes which are only available before you exit the initial deployment screen. Check the south woods for initial deployment hexes!"

Thanks, but seriously, it will not allow me to deploy there. The city hexes are
not highlighted, and trying to force deployment does not work.
Actually, I just replayed the scenario before it, and now I do not have the problem anymore. Must have been a bug..

Me either (what a bump I just did!). Must have been luck - I did the same (assuming I just missed the deployment hex) and it still wouldn't allow it.