May i request we study it for a moment longer? This command will display extended attributes (if any), which could be interesting:
xattr -l /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
Also... if this command doesn't produce too much output, please post:
strings /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
Here are the results of the two instructions. They were done both with Invisibles invisible and with Invisibles visible.
xattr -1 /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
com.apple.TextEncoding: macintosh;0
strings /Users/Beverley/Library/Preferences/.a23t.mk4e.plist
streamtyped
NSNumber
NSValue
NSObject
ryck