modules/gui/qt4/dialogs/interaction.cpp: In InteractionDialog::update() use a msg_Dbg instead of a wrong msg_Err.

modules/gui/qt4: Display time in seek bar when mouse-over. (Patch by Antoine Lejeune. Reviewed by jb.)

This was blatantly insecure.

modules/gui/qt4: add an update dialog box to the help menu. (Patch by Remi Duraffort. Reviewed by jb).

control/media_descriptor.c: Don't forget to release the event manager. (Reported by polo78 on the forum and funman).

add an unspported demux query to remove a useless error. Show the query number when it's unknown (for the future)

activex: fixed registration problems as reported in forums (i.e DllRegisterServer@0 postfix is removed). damn libtool !