Hi,
I am using Netbeans 6.5 IDE. In the IDE, errors and warnings are highlighted as and when code is being written. I recently installed a plugin and since then, none of the errors are being highlighted in any code that I type in. Only after I build a project do I get to know about all the errors. The plugin I installed may have deactivated the automatic highlighting of errors. How do I fix it?? I tried deactivating the plugin, but in vain.
Another possible Solution is to reset your IDE. But remember it will delet all your custom settings.
Here is an useful Link: http://blogs.sun.com/NetBeansSupport/entry/resetting%5Fthe%5Fnetbeans%5Fuserdir
As i stated in pixelines answer i would suggest you to do an Update. Netbeans Plugins are working more efficient now.
I'm not sure if this applies to Java, but with the C/C++ plugin it's possible to switch this highlighting on/off via Options -> C/C++ -> Highlighting