I've been playing Galciv II since it was released. I stopped playing for about 2 months and downloaded the latest update 1.31 now (per SDCentral).
I never experienced the problem I have at the moment:
If I use the leftclick in map scroll it gets very choppy. I measured the framrate per FRAPS and got 100+ fps using the edge scroll as well as the click + hold minimap scroll. As soon as I click and drag directly in the map it drops down to 7-12 fps.
My configuration:
Athlon 64 3700+ no OC
Nvidia 6600GT 128MB no OC
2048 MB Ram + 1536 MB Paging File
The things I've done so far which brought no noticable improvement:
1) Installed the latest WHQL Nvidia drivers (91.36, had 84.43 before)
2) Decreased resolution to 1024x768, turned off antialiasing
3) Started games in various Galaxy sizes
I haven't the slightest clue what causes this problem, especially as the click + drag in minimap method works smoothly.
I did a few searches, but nothing relevant came up.