Java 5.0 + OSX 10.5 + Netbeans 6.1
It seems OSX 10.5 has issues with JTextBox's created with NetBeans. And probably others. In short, I just bundled my application with " Quaqua " Look & Feel, and it fixed the NullPointerException's. See Quaqua's page for how to do this (there's some really easy to follow instructions on there). I'd like to rant that I've found multiple people complaining about the OSX implementation of swing causing NullPointerException's in the EVT (Event Dispatch Thread) of their applications, but mostly with Java 1.3 or Java 1.4, and commonly with the "Save As" dialog. Its a bit embarrassing that Macintosh's Look & Feel is buggier than the Open-Source community supported one, but this isn't the only case where the open-source alternative is much better in the Java world. ( http://jtds.sourceforge.net/benchTest.html ) Here's some similar posts: http://lists.apple.com/archives/java-dev/2003/Apr/msg00858.html http://bugs.sun.com/...