GetTickCounts() has a granularity in windows of 25 msec's.
Girotel's serial communication appears to depend on it, so I guess
it's a feature...

windows/message.c

diff --git a/windows/message.c b/windows/message.c
index 92189da..ccf471b 100644
--- a/windows/message.c
+++ b/windows/message.c
@@ -1848,7 +1848,8 @@
 {
     struct timeval t;
     gettimeofday( &t, NULL );
-    return ((t.tv_sec * 1000) + (t.tv_usec / 1000)) - MSG_WineStartTicks;
+    /* make extremely compatible: granularity is 25 msec */
+    return ((t.tv_sec * 1000) + (t.tv_usec / 25000) * 25) - MSG_WineStartTicks;
 }