Apple has confirmed that users of the 10.3.9 version of Mac OS X might encounter some issues with the Safari Web browser that is part of that OS. Seemingly, a known bug can cause the software to unexpectedly quit, or even not start properly at all. Apple has circulated a quick test which users can perform to see if their OS installation suffers from this problem.

To test if the problems affect a Mac system with OS X 10.3.9, Apple recommends running the Terminal applications, which resides inside in the Utilities folder, which is in the Applications folder. After running the app, type 'java -version' (without quote marks) and press Return.

"If this issue affects your computer, you will get the message, "Segmentation fault"," Apple said.

To resolve this issue, you should upgrade or re-install Java 1.4.2 Update 2 and/or Security Update 2005-002. According to Apple, this will put everything right again.