Which terrain(s) are being loaded? (Go to 'Select Terrain' off the main menu and note the highlighted terrain name.)
I get a crash to desktop while loading Offline Practice (or trying to host LAN 8-player) with every terrain I have (I've checked all of them):
beta2
compello
coralsea
festerma
frac3
midway1
mmesa
montis
ndisles
smpizza
Don't know if it's useful, but here's the crash info from the Vista crash dialog:
Problem signature:
Problem Event Name: APPCRASH
Application Name: aceshigh.exe
Application Version: 0.0.0.0
Application Timestamp: 47fbabd9
Fault Module Name: aceshigh.exe
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 47fbabd9
Exception Code: c0000005
Exception Offset: 0001ef83
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 3081
Additional Information 1: 8d13
Additional Information 2: cdca9b1d21d12b77d84f02df48e34
311
Additional Information 3: 8d13
Additional Information 4: cdca9b1d21d12b77d84f02df48e34
311