.NET Framework 2.0 brings some changes to Remoting, .NET's communication mechanism, and more changes are on the way. Make sure your code is up to date.
Modern microkernels such as L4 address many of the problems of older microkernels--specifically, the speed the interprocess communication (IPC) implementation.
When the semantics of collection and enumerator interfaces are blurred, either through mistakes that we (the programmers) make, or by less-than-optimal design of the interfaces themselves, things can get hairy.
Rex continues his discussion of the C++/CLI threading implementation, focusing on shared variables during concurrent operations, thread-local storage, and interlocked operations.