Upps - lost commit meesage, so here:
Make more clean work around for OpenOffice:
Some applications ( OpenOffice at least ) sets owner at
begining of selection instead of after finishing selection. And
gtk_clipboard_wait_for_text() will fix state of X-Selection. So,
GTK clipboard will see only small part of real selection. For preventing
from this misbehaviour we will not try to get contents of selection -
just skip it as image etc. However, it's possible to delay
request of contents - but I don't know way to count correct
timeout or to get finalizing event (may be yet :) )