From: Paul Walmsley <paul@booyaka.com>

When a window is shaded, a doubleclick on its edge should
be interpreted to mean that the user is trying to unshade
the window.  Otherwise, xfwm4 will corrupt the window's size
information.

This is one possible fix for Debian bug 624475.


--- src/events.c.backup	2011-04-28 15:05:18.541353140 -0600
+++ src/events.c	2011-04-28 15:08:30.926262260 -0600
@@ -572,19 +572,26 @@
         tclick = typeOfClick (screen_info, c->window, (XEvent *) ev, TRUE);
         if (tclick == XFWM_BUTTON_DOUBLE_CLICK)
         {
-            switch (part)
+            if (FLAG_TEST (c->flags, CLIENT_FLAG_SHADED))
             {
-                case CORNER_COUNT + SIDE_LEFT:
-                case CORNER_COUNT + SIDE_RIGHT:
-                    clientFill(c, CLIENT_FILL_HORIZ);
-                    break;
-                case CORNER_COUNT + SIDE_TOP:
-                case CORNER_COUNT + SIDE_BOTTOM:
-                    clientFill(c, CLIENT_FILL_VERT);
-                    break;
-                default:
-                    clientFill(c, CLIENT_FILL);
-                    break;
+                clientUnshade(c);  
+            }
+            else
+            {
+                switch (part)
+                {
+                    case CORNER_COUNT + SIDE_LEFT:
+                    case CORNER_COUNT + SIDE_RIGHT:
+                        clientFill(c, CLIENT_FILL_HORIZ);
+                        break;
+                    case CORNER_COUNT + SIDE_TOP:
+                    case CORNER_COUNT + SIDE_BOTTOM:
+                        clientFill(c, CLIENT_FILL_VERT);
+                        break;
+                    default:
+                        clientFill(c, CLIENT_FILL);
+                        break;
+                }
             }
         }
         else if (tclick == XFWM_BUTTON_DRAG)