Attached file, a .fla file with extension changed to .zip for convenience for it is a ZIP archive, cannot be extracted or even listed by 7z (latest beta).
The same file is opened by Windows Compressed Folder, WinZip. WinRar also fails to deal with it.
I am discovering such archives time after time, the one that aren't opened by 7z but handled well by Windows Compressed folder. Do they employ some compression feature that is missing? Is there a chance of getting this feature in 7z?