--- a/src/gui/kernel/qclipboard_x11.cpp	Tue Jul 06 15:10:48 2010 +0300
+++ b/src/gui/kernel/qclipboard_x11.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -1518,7 +1518,7 @@
           (unsigned int)(d ? d->timestamp : 0), (unsigned int)timestamp);
 #endif
     if (!owner || (selectionOwner && selectionOwner != owner->internalWinId()) ||
-        (!selectionOwner && d->timestamp != CurrentTime && d->timestamp < timestamp))
+        (!selectionOwner && (d->timestamp == CurrentTime || d->timestamp < timestamp)))
         return qt_check_selection_sentinel();
     return false;
 }
@@ -1532,7 +1532,7 @@
           (unsigned int)(d ? d->timestamp : 0), (unsigned int)timestamp);
 #endif
     if (!owner || (clipboardOwner && clipboardOwner != owner->internalWinId()) ||
-        (!clipboardOwner && d->timestamp != CurrentTime && d->timestamp < timestamp))
+        (!clipboardOwner && (d->timestamp == CurrentTime || d->timestamp < timestamp)))
         return qt_check_clipboard_sentinel();
     return false;
 }