Before there are too much rumors in this thread:
Concerning the "bind" command floating around in this thread: If you are talking about the "bind" from the tcl/tk manuals, the discussion is pointless, since "bind" is a tk command, not available in tcl only apps (such as aolserver) and not particulary useful for the discussed functionality either. i can't exclude that there is a tcl proc named "bind" provided by ]po[.
Concerning Tcl 8.4 and 8.5: I fail to see any connection to this topic. However the sitation is as follows: The Tcl Core Team wrote more than two years ago: "Routine maintenance of Tcl/Tk 8.4 has now come to an end". So, OCT decided to switch to Tcl 8.5:
http://www.openacs.org/forums/message-view?message_id=3357449
