Tested on 6.14 and 6.16 and both crashed
On 6.14 it wouldn't crash until I tried to change fonts again with /font
but if you do
/font -z 12 "C:\Programfiler\mIRC\<fontname>"
then
/font -z 12 fixedsys it won't crash
6.16 crashed when I tried
/font -z 12 "C:\Programfiler\mIRC\<fontname>"
