if you don't have a particular or old mod the remaining problems are the q3msgboom which doesn't have a real fix (for example the only work-around I gave was to remove the "vsay" command) and a bug which affects only ET and for some unknown reasons is almost unknown and not indexed on security websites (mah).
the only "trace" I have found about it (after that one of my contacts talked about it less than one week ago) is the following:
http://www.tommyserver.de/et.phpin any case I suggest you to find an ET community where you and other admins can discuss about these and other problems because personally I have almost no knowledge of this game and the only fixes/work-around I created were those on my website.