diff --git a/libs/midi++2/parser.cc b/libs/midi++2/parser.cc
index da75aec248..8ac24c09a9 100644
--- a/libs/midi++2/parser.cc
+++ b/libs/midi++2/parser.cc
@@ -554,6 +554,7 @@ Parser::realtime_msg(unsigned char inbyte)
 
 	switch (inbyte) {
 	case 0xf8:
+		std::cerr << "tick\n";
 		timing (*this, _timestamp);
 		break;
 	case 0xf9:
diff --git a/libs/pbd/event_loop.cc b/libs/pbd/event_loop.cc
index f8ee665203..a13748d1a0 100644
--- a/libs/pbd/event_loop.cc
+++ b/libs/pbd/event_loop.cc
@@ -115,10 +115,10 @@ EventLoop::get_request_buffers_for_target_thread (const std::string& target_thre
 	vector<ThreadBufferMapping> ret;
 	Glib::Threads::Mutex::Lock lm (thread_buffer_requests_lock);
 
-	DEBUG_TRACE (PBD::DEBUG::EventLoop, string_compose ("%1 look for request buffers via %2\n",  pthread_name(), target_thread));
+	DEBUG_TRACE (PBD::DEBUG::EventLoop, string_compose ("%1 look for request buffers via %2\n",  pthread_name(), DEBUG_THREAD_PRINT (target_thread)));
 
 	for (auto const & tbr : thread_buffer_requests) {
-		DEBUG_TRACE (PBD::DEBUG::EventLoop, string_compose ("for thread \"%1\", request buffer for %2 (%3) thread %4\n", target_thread, tbr.emitting_thread, tbr.num_requests));
+		DEBUG_TRACE (PBD::DEBUG::EventLoop, string_compose ("for thread \"%1\", request buffer for %2 (%3) thread %4\n", target_thread, DEBUG_THREAD_PRINT(tbr.emitting_thread), tbr.num_requests));
 		ret.push_back (tbr);
 	}
 
@@ -191,7 +191,7 @@ EventLoop::remove_request_buffer_from_map (pthread_t pth)
 	Glib::Threads::Mutex::Lock lm (thread_buffer_requests_lock);
 
 	for (ThreadRequestBufferList::iterator x = thread_buffer_requests.begin(); x != thread_buffer_requests.end(); ++x) {
-		if (x->emitting_thread == pth) {
+		if (pthread_equal (x->emitting_thread, pth)) {
 			thread_buffer_requests.erase (x);
 			break;
 		}
diff --git a/libs/pbd/pbd/abstract_ui.cc b/libs/pbd/pbd/abstract_ui.cc
index d0750d7fa0..7d1901d999 100644
--- a/libs/pbd/pbd/abstract_ui.cc
+++ b/libs/pbd/pbd/abstract_ui.cc
@@ -115,7 +115,7 @@ AbstractUI<RequestObject>::register_thread (pthread_t thread_id, string thread_n
 		return;
 	}
 
-	DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("in %1 (thread name %2), [%3] (%4)  wants to register with us (%1)\n", event_loop_name(), pthread_name(), thread_name, thread_id));
+	DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("in %1 (thread name %2), [%3] (%4)  wants to register with us (%1)\n", event_loop_name(), pthread_name(), thread_name, DEBUG_THREAD_PRINT(thread_id)));
 
 	/* the per_thread_request_buffer is a thread-private variable.
 	   See pthreads documentation for more on these, but the key
@@ -135,7 +135,7 @@ AbstractUI<RequestObject>::register_thread (pthread_t thread_id, string thread_n
 
 		if (ib == request_buffers.end()) {
 			/* create a new request queue/ringbuffer */
-			DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("create new request buffer for %1 in %2 from %3/%4\n", thread_name, event_loop_name(), pthread_name(), thread_id));
+			DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("create new request buffer for %1 in %2 from %3/%4\n", thread_name, event_loop_name(), pthread_name(), DEBUG_THREAD_PRINT(thread_id)));
 			b = new RequestBuffer (num_requests); // XXX leaks
 			store = true;
 		}
@@ -152,7 +152,7 @@ AbstractUI<RequestObject>::register_thread (pthread_t thread_id, string thread_n
 
 		Glib::Threads::RWLock::WriterLock rbml (request_buffer_map_lock);
 		request_buffers[thread_id] = b;
-		DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("%1/%2/%3 registered request buffer-B @ %4 for %5\n", event_loop_name(), pthread_name(), DEBUG_THREAD_SELF, b, thread_id));
+		DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("%1/%2/%3 registered request buffer-B @ %4 for %5\n", event_loop_name(), pthread_name(), DEBUG_THREAD_SELF, b, DEBUG_THREAD_PRINT(thread_id)));
 
 	} else {
 		DEBUG_TRACE (PBD::DEBUG::AbstractUI, string_compose ("%1 : %2 is already registered\n", event_loop_name(), thread_name));
diff --git a/libs/pbd/pbd/debug.h b/libs/pbd/pbd/debug.h
index aed65c1e1f..bda8bd7c7e 100644
--- a/libs/pbd/pbd/debug.h
+++ b/libs/pbd/pbd/debug.h
@@ -84,8 +84,10 @@ namespace PBD {
 #define DEBUG_ENABLED(bits) (((bits) & PBD::debug_bits).any())
 #ifdef PTW32_VERSION
 #define DEBUG_THREAD_SELF pthread_self().p
+#define DEBUG_THREAD_PRINT(t) t.p
 #else
 #define DEBUG_THREAD_SELF pthread_self()
+#define DEBUG_THREAD_PRINT(t) t
 #endif
 
 #define DEBUG_TIMING_START(bits,td) if (DEBUG_ENABLED (bits)) { td.start_timing (); }