There are many issues with the latest Oracle Java 7 update for Mac:
- Smart Client 7.1: crashes on open;
- Smart Client 6.0: Error on the DBTree bean;
- Smart Client 5.2: works correctly;
I suggest to NOT update.
I reverted to Java 6 using the following:
1. Open Terminal, located in the Utilities folder. (This can be found in the spotlight search in the top right-hand side of your screen)
2.Enter this command, then press the Return or Enter key
sudo mkdir -p /Library/Internet\ Plug-Ins/disabled
3. Enter this command, then press the Return or Enter key:
sudo mv /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin /Library/Internet\ Plug-Ins/disabled
4. Enter this command, then press the Return or Enter key:
sudo ln -sf /System/Library/Java/Support/Deploy.bundle/Contents/Resources/JavaPlugin2_NPAPI.plugin /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
5. To re-enable Java SE 6 Web Start, enter this command, then press the Return or Enter key:
sudo ln -sf /System/Library/Frameworks/JavaVM.framework/Commands/javaws /usr/bin/javaws