More than one user has now reported that weld deployments which used to work in earlier AS versions (6.0.0.M2) have started failing in M3 with the following error:

18:51:45,567 SEVERE [javax.enterprise.resource.webcontainer.jsf.config] : java.util.zip.ZipException: error in opening zip file
at java.util.zip.ZipFile.open(Native Method) [:1.6.0_17]
at java.util.zip.ZipFile.<init>(ZipFile.java:114) [:1.6.0_17]
at java.util.jar.JarFile.<init>(JarFile.java:133) [:1.6.0_17]
at sun.net.www.protocol.jar.URLJarFile.<init>(URLJarFile.java:67) [:1.6.0_17]
at sun.net.www.protocol.jar.URLJarFile$1.run(URLJarFile.java:214) [:1.6.0_17]
at java.security.AccessController.doPrivileged(Native Method) [:1.6.0_17]
at sun.net.www.protocol.jar.URLJarFile.retrieve(URLJarFile.java:198) [:1.6.0_17]
at sun.net.www.protocol.jar.URLJarFile.getJarFile(URLJarFile.java:50) [:1.6.0_17]
at sun.net.www.protocol.jar.JarFileFactory.get(JarFileFactory.java:68) [:1.6.0_17]
at sun.net.www.protocol.jar.JarURLConnection.connect(JarURLConnection.java:104) [:1.6.0_17]
at sun.net.www.protocol.jar.JarURLConnection.getJarFile(JarURLConnection.java:71) [:1.6.0_17]
at com.sun.faces.config.AnnotationScanner.processClasspath(AnnotationScanner.java:290) [:2.0.2-FCS]
at com.sun.faces.config.AnnotationScanner.getAnnotatedClasses(AnnotationScanner.java:215) [:2.0.2-FCS]
at com.sun.faces.config.ConfigManager$AnnotationScanTask.call(ConfigManager.java:765) [:2.0.2-FCS]
at com.sun.faces.config.ConfigManager$AnnotationScanTask.call(ConfigManager.java:736) [:2.0.2-FCS]
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) [:1.6.0_17]
at java.util.concurrent.FutureTask.run(FutureTask.java:138) [:1.6.0_17]
at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:329) [:2.0.2-FCS]
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:223) [:2.0.2-FCS]
at org.jboss.web.jsf.integration.config.JBossJSFConfigureListener.contextInitialized(JBossJSFConfigureListener.java:72) [:6.0.0.20100429-M3]

Please see the referenced forum thread for the complete details