xcb and xlib events

Hello,

Another strange question:

In ecore event loop, when i use xlib port, for a program, I have this
sequence of events during the event loop :

8 ProperNotify events
2 Expose events
1 ProperNotify event
etc...

The loop is something like :


while (XPending(d))
  {
     XEvent ev;

     XNextEvent(d, &ev);

     ***
  }

But when I use the xcb port, I get the sequence of events:

8 ProperNotify events

and that' all, the loop finishes. The loop is something like:

while (ev = XCBPollForEvent (c, 0))
  {
     ***
  }

So, is it normal ? Do you think it could be a bug in xcb ?

thank you

Vincent Torri