Not hitting a breakpoint in a finally block, how is that possible?

I'm debugging the open source SvnIndex application (which you can get at Svn Query).  My breakpoint is in the Program.cs file in the Main method.

       static void Main(string[] args)
        {
            AppDomain.CurrentDomain.UnhandledException += OnUnhandledException;
            Mutex mutex = null;
            try
            {
                IndexerArgs indexerArgs = new IndexerArgs(args);
                mutex = new Mutex(false, indexerArgs.IndexPath.ToLowerInvariant().Replace('\\', '_').Replace(':', '_'));
                try
                {
                    mutex.WaitOne();
                }
                catch (AbandonedMutexException)
                {
                    Console.WriteLine("Warning: Mutex was abandoned from another Process");
                }

                Indexer indexer = new Indexer(indexerArgs);
                indexer.Run();
            }
            catch (IndexerArgsException x)
            {
                Console.WriteLine(x.Message);
            }
            finally
            {
                if (mutex != null)
                {
                    mutex.ReleaseMutex();
                    mutex.Close();
                }
            }            
            AppDomain.CurrentDomain.UnhandledException -= OnUnhandledException;
#if DEBUG
            Console.WriteLine("Press any key");
            Console.ReadKey();
#endif
        }

I'm getting to the indexer.Run() statement just fine.  I have a breakpoint on theif (mutex != null) line in the finally block.  I hit F10 on the indexer.Run() statement and I never hit my breakpoint (or the breakpoint I have set in the catch block).  My understanding is that the code in the finally block ALWAYS gets executed, so how is this possible?

-Charlie