It's my opinion that the dialog looks awesome, and mIRC scaled it perfectly. The problem is when the fonts are rendered at such an extreme point size, that they will mutilate certain paint-jobs of various controls. The controls are all there and properly fitted, neatly arranged, but swelling under the pressure of bloated text.

If it were a pixel vs dbu problem, you would have controls overlapping each other on the x/y positions, and everything would be shifted to the bottom-right or so.

Well. At least I won lunch.
Good philosophy, see good in bad, I like!