Right, but the menu extra simply doesn't show up. When I opened the application resources and ran the starter script for Library Books manually, the star temporarily appeared in the menu bar with the number 0, and the following was logged to my console.log:

2005-01-25 23:27:31.362 Library Books[3343] MainController: awakeFromNib
2005-01-25 23:27:31.863 Library Books[3343] StatusMenu: updateMenu
2005-01-25 23:27:31.922 Library Books[3343] StatusMenu: updateMenu
2005-01-25 23:27:31.965 Library Books[3343] Displaying preferences window
2005-01-25 23:27:32.517 Library Books[3343] *** Assertion failure in -[NSSecureTextFieldCell _objectValue:forString:], AppKit.subproj/NSCell.m:1131
2005-01-25 23:27:32.520 Library Books[3343] An uncaught exception was raised
2005-01-25 23:27:32.521 Library Books[3343] Invalid parameter not satisfying: aString != nil
2005-01-25 23:27:32.524 Library Books[3343] *** Uncaught exception: <NSInternalInconsistencyException> Invalid parameter not satisfying: aString != nil
2005-01-25 23:27:32.531 Library Books[3343] Catalogue URL [http://catalogue.yprl.vic.gov.au]

The terminal process ended with:

Trace/BPT trap
logout

No big deal though, my library doesn't use a SIRSI system so I wouldn't use it, I just wanted to take a look at it as I was thinking about doing something like it to work with my local library system.