I followed the instructions in Mike's most excellent "The Official
What-I-Did-To-Run-5.3-On-Leopard Post" to get my WO 53 apps running on
Leopard. Thanks Mike! I had to correct the permissions on /Library/
WebObjects/Configuration/ - thanks to Art for the logs to make that
easy to find.
It looks like /System/Library/WebObjects/Executables/WOLaunchURL is
missing from the WO54 install (maybe it's not needed, I haven't
checked) but it means that auto-open in browser fails with WO53.
I copied mine from my Tiger snapshot and it's all good.