Failure to list a directory on Mac OSX 1.5.1

I can no longer connect to Mac OS X servers while using WinSCP 4.0.5, see the error below:

Unexpected directory listing line '-rw-r--r--@ 1 user500 staff 15364 Dec 16 11:34 .DS_Store'.
'@' is not a valid integer value


The "@" indicates some sort of extended permissions

See this post
https://winscp.net/forum/viewtopic.php?t=5132

For list of reasons WinSCP cannot parse directory listing and possible resolutions, see documentation.