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Using NB 6.0 Milestone 8 on WinXP with JDK 6.0. I installed the visualgc module (visualgc-1.1.1.nbm) and the NetBeans Profiler started having problems.... I can no longer reliably do memory profiling of an application that is deployed to the built-in Tomcat server. The "performing instrumentation" dialog comes up and never goes away.... Disabling the visualgc module seems to fix the problem.