First off, this game is awesome

I never thought any turn-based space game would displace Master of Orion 2, till now

However, I'm getting some veeeery odd graphical glitches when playing, especially when playing the campaign. It occurs in both windowed and fullscreen mode, at multiple resolutions. Reloading saves doesn't fix it. Have uploaded some screen shots to my website:
http://www.evilbill.org.uk/weird1.jpg
http://www.evilbill.org.uk/weird2.jpg
http://www.evilbill.org.uk/weird3.jpg
Have also copied+pasted my debug.err file below:
Debug Message: Version v1.0 last updated on: Mon Feb 6 12:52:05 2006
Debug Message: Could not find a TGN Serial No.
Debug Message: *********DXDiag info follows.*********
System Info
Time: 10/11/2006, 17:40:22
DirectX Version: DirectX 9.0c (4.09.0000.0904)
Machine Name: RAMESSES
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.050301-1519)
Languages: English (Regional Setting: English)
System Manufacturer: VIAK8M
System Model: AWRDACPI
BIOS: Phoenix - AwardBIOS v6.00PG
Processor: AMD Sempron(tm) Processor 3300+, MMX, 3DNow, ~2.0GHz
Physical Memory: 1024MB RAM
Page File: 431MB used, 3564MB available
Windows Dir: C:\WINDOWS
Display Info
Display device 1:
Device Name: \\.\DISPLAY1
Card Name: NVIDIA GeForce 6200
Manufacturer: NVIDIA
Chip Type: GeForce 6200
DAC Type: Integrated RAMDAC
Key Device: Enum\PCI\VEN_10DE&DEV_0221&SUBSYS_00000000&REV_A1
Display Memory: 256.0 MB
Current Display Mode: 1280 x 1024 (32 bit) (60Hz)
Monitor Name: Plug and Play Monitor
Monitor Max Resolution: 1600,1200
Driver Name: nv4_disp.dll
Driver Version: 6.14.0010.9147
Driver Date: 8/11/2006 21:42:52
DirectX Acceleration Enabled: Yes
Sound info
Sound device 1:
Description: VIA AC'97 Audio (WAVE)
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: PCI\VEN_1106&DEV_3059&SUBSYS_18281019&REV_60
Manufacturer ID: 1
Product ID: 100
Driver Name: viaudios.sys
Provider: VIA Technologies, Inc.
Driver Version: 6.14.0001.3870
Driver Date: 6/16/2003 11:05:40
Type: WDM
Other Drivers:
Acceleration Level: 3
Cap Flags: 0
Min/Max Sample Rate: 0, 0
Debug Message: *********END dxdiag info.*********
Debug Message: Entering WinMain
Debug Message: ******* Starting Game Shell *******
Debug Message: Preparing to change display settings.
Debug Message: Using multilsample setting: D3DMULTISAMPLE_NONE
Debug Message: Game Resolution: 1024 x 768
Debug Message: Running in windowed mode.
Debug Message: HAL (hw vp): NVIDIA GeForce 6200
Debug Message: D3DPRESENT_INTERVAL_IMMEDIATE
Debug Message: Refresh rate: 0
Debug Message: Bit Depth: 32 bit.
Debug Message: *********Checking D3DDevice Caps***********************
Debug Message: A full-color cursor is supported in hardware at high resolution modes.
Debug Message: Border size reported as 6 by 25
Debug Message: RGB in format 6:6:6, Masks reported as ff0000:ff00:ff
Debug Message: Now windowed.
Debug Message: Shell initialization complete
Debug Message: ***** Initializing Game *****
Debug Message: Timer Frequency is 0 369e99
Debug Message: Initializing sound card.
Debug Message: initailizing bink
Debug Message: Create setup screens.
Debug Message: Clear galaxy settings.
Debug Message: Clear influence.
Debug Message: Clear up laws.
Debug Message: Clear first time events.
Debug Message: Clear wonders and trade goods.
Debug Message: Clear sector mapper.
Debug Message: Set mouse.
Debug Message: Set update timer.
Debug Message: Clear data definitions.
Debug Message: No files found matching mask e:\\My Games\GalCiv2\*.StarSystems
*DEBUG ERROR: ***Unable to find required tech ImpossibleTech for PirateShip. ***
*DEBUG ERROR: ***Unable to find required tech ImpossibleTech for Starbase. ***
Debug Message: Reading Star Names
Debug Message: Reading Star Names... Done
Debug Message: No files found matching mask e:\\My Games\GalCiv2\Logos\*.sav
Debug Message: No files found matching mask e:\\My Games\GalCiv2\Metaverse\*.sav
Debug Message: No files found matching mask e:\\My Games\GalCiv2\Mods\*.sav
Debug Message: No files found matching mask e:\\My Games\GalCiv2\Portraits\*.sav
Debug Message: No files found matching mask e:\\My Games\GalCiv2\ships\*.sav
Debug Message: No files found matching mask e:\\My Games\GalCiv2\temp\*.sav
Debug Message: Killing threads.
Debug Message: Kiling civs.
Debug Message: Killing ships.
Debug Message: Killing rallypoints.
Debug Message: Killing misc objects.
Debug Message: Killing stars.
Debug Message: Killing anomalies.
Debug Message: Killing space resources.
Debug Message: Killing colonies and planets.
Debug Message: killing scenario.
Debug Message: Clear galaxy settings.
Debug Message: Clear influence.
Debug Message: Clear up laws.
Debug Message: Clear first time events.
Debug Message: Clear wonders and trade goods.
Debug Message: Clear sector mapper.
Debug Message: Loading Campaign Data
Debug Message: Loading Scenario Data
Debug Message: Loading Custom Map
Debug Message: Loading Data Defs
Debug Message: Clear data definitions.
Debug Message: Loading TechDefs
Debug Message: Max num techs: 248
Debug Message: Loading ImprovementDB
Debug Message: Loading Component Defs
Debug Message: Loading ShipTypes
Debug Message: Loading ShipConfigs
Debug Message: Loading AnomalyTypes
Debug Message: Loading RandomEvents
Debug Message: Loading UPIssues
Debug Message: Loading ResourceTypes
Debug Message: Loading InvasionTactics
Debug Message: Loading SBmodules
Debug Message: Loading PoliticalParties
Debug Message: Loading Planet Types
Debug Message: Loading Star Types
Debug Message: Loading Game
Debug Message: Loading Galaxy
Debug Message: Loading FOW Map
Debug Message: Loading ZOC Map
Debug Message: Loading Planets
Debug Message: Loading Stars
Debug Message: Loading Anomalies
Debug Message: Loading Resources
Debug Message: Loading Civs
Debug Message: Loading Colonies
Debug Message: Loading RallyPoints
Debug Message: Loading Ships
Debug Message: Loading Fleets
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Loading Influence
Debug Message: Loading Tech Order
Debug Message: Loading ENDGALAXYDATA
Debug Message: Updating ZOC.
Debug Message: UIBeginGame called with g_ulLocalPlayerID = 0
Debug Message: setting size 16 x 0
Debug Message: setting size 16 x 0
Debug Message: setting size 16 x 0
Debug Message: WM_CLOSE message received.
Debug Message: GameUninitialize start
Debug Message: Killing Galaxy
Debug Message: Killing threads.
Debug Message: Kiling civs.
Debug Message: Killing ships.
Debug Message: Killing rallypoints.
Debug Message: Killing misc objects.
Debug Message: Killing stars.
Debug Message: Killing anomalies.
Debug Message: Killing space resources.
Debug Message: Killing colonies and planets.
Debug Message: killing scenario.
Debug Message: Clear galaxy settings.
Debug Message: Clear influence.
Debug Message: Clear up laws.
Debug Message: Clear first time events.
Debug Message: Clear wonders and trade goods.
Debug Message: Clear sector mapper.
Debug Message: Clear data definitions.
Debug Message: Killing Galaxy: Completed
Debug Message: GameUninitialize end
Debug Message: Device not cleared. 3 counts left.
Debug Message: D3D not cleared. 1 counts left.
Debug Message: Destroying Window.
Debug Message: Main Shell terminating normally