I just installed yesterdays Mac OS X Update and it broke Safari and InfiniteCanvas. Safari crashed every time during startup, but I was able to fix that - I removed the AcidSearch PlugIn. The problem with IC persists, it crashes when using Preview. Apple updated it’s Java Runtime in 10.3.9 and I think this is causing problems. I’ll try to examine this issue and post a fix as soon as possible.

UPDATE: I’m also experiencing crashes when loading Java Applets (also my Applet) in Safari.

UPDATE #2: I fixed the Java Problem by reinstalling Security Update 2005-002. I found this hint on MacFixIt.

UPDATE #3: Apple released a Java Update for the mentioned 10.3.9 Java Problem. You can download the Update with SoftwareUpdate or from Apple Support.