Ok - had the following responses from the user to the echo script:
width 3840 height 2160 / dbuw 2.5 dbuh 2.5
width 2560 height 1920 / dbuw 2.5 dbuh 2.5
This doesn't look right to me. Shouldn't the first one have a higher dbuw/h?
I assume these are different screens as first is 16:9 wide-screen and second 4:3 old-style.
However user incorrectly said he was using 1024x768 for the second - and screen shot at 2560x1920 shows it is still corrupt at that resolution.
User also reports that dialogs are fine on mirc 6.35 but not on mIRC 7.44, and that removing `option notheme` makes no difference.