After dealing with the Apple phone robot on 133622...

Apple Support: Hello, this is (Indian name given). What is your name?
Me: Vlad James
Apple Support: How do you spell your first name?
Me: My first name is Vladimir, V-l-a-d-i-m-i-r.
Apple Support: What is your surname?
Me: James, J-a-m-e-s.
Apple Support: Okay, what is your telephone number?
Me: 618-9... (number given)
Apple Support: What is the Serial Number of the computer requiring support?
Me: (number given)
Apple Support: Just bear with me. I am checking the warranty.
Me: I don't think it's covered by warranty any longer. I bought it in 2002. Apple Support: Just bear with me. I must check the warranty. (long moments pass) A 17 inch iMac.
Me: Yes, that's it.
Apple Support: What is the problem?
Me: I just upgraded to MacOS 10.4.2, and I can no longer connect connect by ISDN.
Apple Support: Which operating system did you upgrade from?
Me: I upgraded from MacOS 10.4.1 to MacOS 10.4.2.
Apple Support: You upgraded from 10.2?
Me: No. I upgraded from 10.4.1.
Apple Support: Okay. You say you cannot connect.
Me: Yes.
Apple Support: Who is your ISP?
Me: My ISP has nothing to do with it. Telstra supplied the ISDN modem. Telstra is not my ISP.
Apple Support: Do you have third party items connected to your computer?
Me: Yes, I use many third part programs and some third party hardware including the ISDN modem.
Apple Support: We are not trained to give advice on third party items.
Me: (silence)
Apple Support: I can send you some links which should be helpful.
Me: (silence)
Apple Support: What is your email address?
Me: (email address given)
Apple Support: I hope this will be of help. Have a good day.

About five minutes later I receive an email describing in detail the problems Kodak Photo CDs have with MacOSX. Also included were some links to Apple FAQs and Discussions. A second no-reply email follows describing the enhancements of MacOS 10.4.2 and how to install it.

My experience with Telstra is another story again.

Cheers,
Vlad