Right, that sort of bug in IE is one of the more common types: not properly tracing through C++ objects. It isn't, per-se, a bug in the JS VM, given the JS VM'

Right, that sort of bug in IE is one of the more common types: not properly tracing through C++ objects. It isn't, per-se, a bug in the JS VM, given the JS VM's GC is merely acting on what the external code tells it (especially given IE used a separate heap for DOM objects).