I updated to java-1.7.0-openjdk.x86_64 1:1.7.0.75-2.5.4.2.fc20 today (along with the java-1.7.0-openjdk-headless and java-1.7.0-openjdk-devel packages). After the upgrade, nothing java related would run. (not the compiler, not the jar command, and I couldn't run any pre-built .jars.) The error was: > Error occurred during initialization of VM > java/lang/ClassFormatError: Unknown constant tag 99 in class file java/lang/Class Downgrading back to java-1.7.0-openjdk.x86_64 1:1.7.0.60-2.4.3.0.fc20 et al fixed the problem. -- Kevin J. Cummings kjchome@xxxxxxxxxxx cummings@xxxxxxxxxxxxxxxxxx cummings@xxxxxxxxxxxxxxxxxxxxxxx Registered Linux User #1232 (http://www.linuxcounter.net/) -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org