071003, Ocean L&F, JDK 6. Open some XML file, e.g. XSLT, and press Ctrl-7. The Navigator window will appear with some
node selected, but no focus. If you want to e.g. use arrow keys to select a different element, you need to press Tab.
Minor but annoying.
...so that pressing of Tab can be considered as workaround.
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue.
Thanks for your cooperation,
NetBeans IDE 8.2 Release Boss