Shoutbox

1) The (!P) parameter tag doesn't work anymore like in Plus!3 (unfortunatly).

You can't enter some text as a parameter anymore on the command line. To enter text as a parameter you need to either select the command from the menu (as you discovered) or simply enter the command only. A dialog asking for the parameter will always popup...

2) Replacing commands with quicktexts does work as quicktexts do take precedence over standard commands... but only if used correctly.

The problem here is related to point 1: If you enter a parameter on the command line, the command is interpreted as the standard build-in command and thus will set your nick to whatever you entered as parameter. If you do not enter something on the command line, the parameter dialog will popup and it will work as intended.

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If you still want it to be able to interpret parameters entered on the command line, you should make a script instead.