Before I get into the problems, I just want to say that GC2 looks like it's going to be flat out awesome (once it's stable

heh). Definitely better than GC1, and that's saying a lot.
However, I have had a few serious snags - I'm not sure if you're aware of them, and I haven't seen any posts relating to them for 4C.
I'll start off with basic system info before I go ahead with the problems..
AMD 64 (Socket 754, unsure of core designation) 3000+ (2.00GHz)
Radeon 9800 Pro 256bit/128mb, 8xAGP, FastWrites on (GDDR2, I believe)
1024mb PC3200
ABit motherboard (can't remember the model off hand - it's based off the K8T800 Pro chipset)
Win 2k SP4
GC2 v0.78[b].005
DirectX 9.0c
ATI Catalyst 5.08 drivers
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Problem 1) When set to fullscreen mode, tabbing out and then back in causes the game to crash. "GALCIV2! 004131b3()"
Problem 2) A few random crashes related to memory access
Problem 3) Even though I may be the most powerful civilization, it doesn't show me there on the quarterly report. It also often comments that I have 0% of the galactic influence, though that is clearly not the case..
Problem 4) Rather often, the game acts extremely oddly. This normally occurs at the tech screen after a successful tech research, when you are prompted to choose a new tech. This CAN and does also happen any time (ie when I'm surfing across the map looking for something, in the government screen, pretty much anywhere), but primarily it happens as I first described. When it happens on the tech screen, none of the tech tree is displayed below the tech list, and there is no "done," button. However, the techs are listed in the top left box. If you hit the turn button, it's still clearly responding to messages as you can hear the associated click on audio. However, nothing else happens, and further attempts to hit the button result in no response. This problem occurs within 12 turns 99% of the time, and often with only a few turns between problems (requires you to exit game, load last auto-save, obviously this can be quite frustrating). If this occurs while say, checking out the map.. everything above the bottom 20% of the screen goes black and stays that way. Alt+F4 does still work here without an unresponsive application message, so it's not an actual crash as it is something really funky going on..
The above problem happened while in the ship design screen, as I went to cancel out. Again, top 80% black, bottom 20% is there. Below is the end of the debug.err file when it happened on that occassion.
Debug Message: TotalTech: 763432
*DEBUG ERROR: ***ForeignTreatiesWnd: Unknown edit field Foreign_Treaties_Lines_Window type: DrawingWindow ***
Debug Message: ForeignReportWnd: Cannot find OBJID Foreign_Report_Race_Button_11
Debug Message: ForeignReportWnd: Cannot find OBJID Foreign_Report_Race_Image_11
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: TotalTech: 763432
Debug Message: Yearly Status Dialog
Debug Message: Yearly Status Dialog 0a
Debug Message: Error. String Not Found. Table: AchievementWnd String Name: TradeGoodBuiltHeadline
Debug Message: TotalTech: 773169
Debug Message: TotalTech: 773169
Debug Message: TotalTech: 773169
Debug Message: TotalTech: 773169
Debug Message: TotalTech: 773169
Debug Message: Error. String Not Found. Table: AchievementWnd String Name: AchievementBuiltHeadline
ASSERT ERROR in file .\Source\Screens\ShipDesignScreen.cpp at line 2683.
ASSERT ERROR in file .\Source\Screens\ShipDesignScreen.cpp at line 2683.
ASSERT ERROR in file .\Source\Screens\ShipDesignScreen.cpp at line 2683.
ASSERT ERROR in file .\Source\Screens\ShipDesignScreen.cpp at line 2683.
Debug Message: TotalTech: 773169
If there's any other information you need, please let me know.