[snuffles]

OSX Version:
Mac OS X 10.3.9 (7W98)
Kernel Version: Darwin 7.9.0

Platform Machine Model: Mac mini
CPU Type: PowerPC G4 (1.2)
Number Of CPUs: 1
CPU Speed: 1.25 GHz
L2 Cache (per CPU): 512 KB
Memory: 512 MB
Bus Speed: 167 MHz
Boot ROM Version: 4.8.9f1

Install Method: DMG

SVN Revision (extracted from the Info.plist in the bundle):
<dict>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleExecutable</key>
<string>XBMC</string>
<key>CFBundleGetInfoString</key>
<string>11.0.rc2</string>
<key>CFBundleIconFile</key>
<string>xbmc.icns</string>
<key>CFBundleIdentifier</key>
<string>com.teamxbmc.xbmc</string>
<key>CFBundleName</key>
<string>XBMC</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>11.0.rc2</string>
<key>CFBundleVersion</key>
<string>Git-20120229-f38655f</string>
<key>CFBundleSignature</key>
<string>xbmc</string>
</dict>
</plist>

How to reproduce this:
(1) Download the image from xbmc.org
(2) Install it
(3) Run it for the first time (and all subsequent times!) and it just exits.
The OSX Console shows:
dyld: /Applications/XBMC.app/Contents/MacOS/XBMC can't open library: /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration (No such file or directory, errno = 2)

Cheers

[Beenje]

You need OS X 10.4 at least.