diff -ur glib-2.6.5/gthread/gthread-posix.c glib-2.6.5-fbsd/gthread/gthread-posix.c
--- glib-2.6.5/gthread/gthread-posix.c	2005-06-09 17:27:13.000000000 +0200
+++ glib-2.6.5-fbsd/gthread/gthread-posix.c	2005-08-13 18:12:54.000000000 +0200
@@ -115,7 +115,11 @@
 # define PRIORITY_NORMAL_VALUE    priority_normal_value
 #endif /* POSIX_MIN_PRIORITY && POSIX_MAX_PRIORITY */
 
+#define G_THREAD_STACK_SIZE32	(1*1024*1024)
+#define G_THREAD_STACK_SIZE64	(2*1024*1024)
+
 static gulong g_thread_min_stack_size = 0;
+static gulong g_thread_default_stack_size = 0;
 
 #define G_MUTEX_SIZE (sizeof (pthread_mutex_t))
 
@@ -125,7 +129,8 @@
 g_thread_impl_init(void)
 {
 #ifdef _SC_THREAD_STACK_MIN
-  g_thread_min_stack_size = MAX (sysconf (_SC_THREAD_STACK_MIN), 0);
+  g_thread_min_stack_size = MAX (sysconf (_SC_THREAD_STACK_MIN),
+    g_thread_min_stack_size);
 #endif /* _SC_THREAD_STACK_MIN */
 #ifdef HAVE_PRIORITIES
 # ifdef G_THREADS_IMPL_POSIX
@@ -176,7 +181,7 @@
   result = pthread_mutex_trylock ((pthread_mutex_t *) mutex);
 
 #ifdef G_THREADS_IMPL_POSIX
-  if (result == EBUSY)
+  if ((result == EBUSY) || (result == EDEADLK))
     return FALSE;
 #else /* G_THREADS_IMPL_DCE */
   if (result == 0)
@@ -309,8 +314,16 @@
       stack_size = MAX (g_thread_min_stack_size, stack_size);
       /* No error check here, because some systems can't do it and
        * we simply don't want threads to fail because of that. */
-      pthread_attr_setstacksize (&attr, stack_size);
     }
+    else
+    {
+      if (sizeof(void *) == 8)
+      g_thread_default_stack_size = G_THREAD_STACK_SIZE64;
+      else
+      g_thread_default_stack_size = G_THREAD_STACK_SIZE32;
+      stack_size = MAX (g_thread_min_stack_size, g_thread_default_stack_size);
+    }
+  pthread_attr_setstacksize (&attr, stack_size);
 #endif /* HAVE_PTHREAD_ATTR_SETSTACKSIZE */
 
 #ifdef PTHREAD_SCOPE_SYSTEM
Only in glib-2.6.5-fbsd/gthread: gthread-posix.c.orig