Crash to desktop upon starting game

I just bought Gratuitous Space Battles in on steam in the ‘Indie Air Pack’.
When I start the game, it crashes to desktop immediately, giving me the message “GSB.exe has stopped working”. This happens immediately, only showing the very first title screen.
The ‘additional information’ is as follows;
Problem signature:
Problem Event Name: APPCRASH
Application Name: GSB.exe
Application Version: 0.0.0.0
Application Timestamp: 4c84faf1
Fault Module Name: GSB.exe
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 4c84faf1
Exception Code: c0000005
Exception Offset: 00006c92
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033
Additional Information 1: fd00
Additional Information 2: ea6f5fe8924aaa756324d57f87834160
Additional Information 3: fd00
Additional Information 4: ea6f5fe8924aaa756324d57f87834160

I run windows Vista 32bit, fully updated. Intel Core 2 Duo 2.4 Ghz. 3GB DDR 1600. PNY XLR8 Geforce GTS 250.

Hi, the game writes debug files to

\my documents\my games\gratuitous space battles\debug

Can you email them to cliff@positech.co.uk
Cheers,