Open "Profiler". Goto "Call tree" and expand some items. Select first line in the table. Use only right mouse button.
Click on different lines some times. After two or more times focus becomes frozen on one line.
Fixed by http://hg.netbeans.org/profiler-main/rev/c19aaf15198e.
Integrated into 'main-golden'
User: Jiri Sedlacek <firstname.lastname@example.org>
Log: Bugfix #163457 - right-click selection problems in tables/treetables