ID:2647763
 
Resolved
Icons were still editable in read-only mode.
BYOND Version:513
Operating System:Windows 10 Pro 64-bit
Web Browser:Chrome 87.0.4280.141
Applies to:Dream Maker
Status: Resolved (513.1542)

This issue has been resolved.
Descriptive Problem Summary:

The "read only" box in the icon editor doesn't actually prevent editing the icon. It does:

Prevent saving (occasionally it just crashes instead)
Prevent undo/redo from working
Prevent clipboard usage


Also, why the hell does the "read only" box default to on for PNG files? Especially ones you've unchecked it on before, that's just dumb.
Lummox JR resolved issue with message:
Icons were still editable in read-only mode.