I don't know why but when I remove the separaters from my toolbar and save it with /toolbar -fs when I either next load mirc or use /toolbar -fl the buttons no longer load.

Easiest fix I found was to write a script for each time I start mirc to remove them.

Only alternative is to make an image for every button but then the connect button no longer works unless I use on connect/disconnect with w/h switches to change the button and adding server/disconnect aliases to the buttons also.