Would it make sense to add a vertical scroll bar to the global options window? I installed 1.2.673 and when I launched it the fonts were huge. I opened the global options dialog to see if there was a setting I could change but the dialog was unusable -- I could only access the top 1/3 because of the font size.
I fixed the problem by deleting ~/.rstudio-desktop, but not everyone will know about this. So my suggestion is to make is possible to use the options dialog in situations where it is not all visible. Even if the issue can't be fixed by tinkering with options, it's frustrating to open the dialog and have it be unusable.