Title sums it up. Hitting F12 doesn't take a screenshot.
[816]Snapshots don't work when viewing map
It... used to?
Surely checking the "Save as Bitmap" box does the same thing.
2.10 didn't let you take snapshots while viewing the map in ZQuest, either, so I don't believe this is actually a bug, just a missing feature that was finally implemented with the "Save as Bitmap" option. I've tested the Zelda Classic player, and taking snapshots of the map work just fine in 816 and 819, so... yeah, I don't think this is a bug.
Yea, I believe that optino was added as a workaround for something otherwise impossible to do in a timely fashion.