OS: Win7, Harmony 12.1 (Premium)
I set export to 960x540, and it exported correctly.
Then set exp. to 1980x1080 and it exported 1600x862.
I found the solution, which was to set the export settings in the Network view; strangely,
this isn’t an issue in Harmony (Advanced), which exports from Open GL to the 1080 size
no problem. From the same project file.
I think having to export from the Network view is an unnecessary step, far too technical
for many people (a LOT of animators, esp. those from a trad background, are going to
find that very intimidating); other programs, including Harmony Advanced, don’t seem to
require such relatively arcane steps. Can’t imagine why there needs to be a difference
between Adv and Premium versions.