This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
The threads view is currently not much space-effective. For example, the State doesn't need to be a text column; actually, it doesn't have to be there at tall since it can be expressed by a background color or an icon, like it is in the debugging view - so user could hide these columns. Related: http://netbeans.org/bugzilla/show_bug.cgi?id=144438
FYI, it would have to be both: icon + different colour. Using colour as an only indicator is not compliant with accessibility guidelines.