Snow Leopard 10.6.3 update may break DeltaWalker

Updating to Snow Leopard 10.6.3 may break your DeltaWalker Cocoa installation - DeltaWalker would fail to start and would close as soon as it displayed the splash screen. This is caused by a corrupt font cache in Snow Leopard and the fix is trivial - clear the font cache. These are the steps:

1. Close all running applications
2. Start Terminal from Applications > Utilities > Terminal
3. Run sudo atsutil databases -remove and enter your admin password
4. atsutil server -shutdown to shut down the font registration system
5. atsutil server -ping to restart
6. Log out and back in

DeltaWalker should now launch successfully!