Overal i think mIRC 6.31 looks very sexy ( i skipped 6.3 ) and im really pleased with the changes however small they are including the changes in the script editor.
One small thing i would love to see added is auto indenting when you type {<enter> or $&<enter>
and automaticly outdent when typing }<enter> or typing enter on a line that was indented due to $&. Currently if you do:
command blah blah $&
more blah blah <enter>
line starts here
while you would want it to do
command blah blah $&
more blah blah <enter>
line starts here
Automatically, i hope i explained that understandable.
This would complete the indenting in the scripts editor.