I downloaded the 1.287 release and tried to start hudson with "java -jar
hudson.war". The result is this stacktrace:

Exception in thread "main" java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:518)
at java.util.zip.ZipFile.getEntry(ZipFile.java:251)
at java.util.jar.JarFile.getEntry(JarFile.java:204)
at sun.net.www.protocol.jar.URLJarFile.getEntry(URLJarFile.java:90)
at
sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:112)
at
sun.net.www.protocol.jar.JarURLConnection.getInputStream(JarURLConnection.java:124)
at java.net.URL.openStream(URL.java:1007)
at Main.extractFromJar(Main.java:255)
at Main.main(Main.java:87)

This happens both on my Windows Box as well as on my OSX machine.