A folder named "abc defg" (which contains the space character" can not be opened for listing. Instead, an error message 450 defg-a: No such file or directory is printed.
The actual folder name doesn't seem to matter much, but the pattern of 3char+space+4char. 3+spc+5 also produces the same error.
I've tested it by comparing with FTP in the MacOS terminal shell. Strangely, the same error comes out on the built in ftp client of Adobe GoLive v6.
I've attached the FTP transcript.
CWD /htdocs/abc defg
250 CWD command successful
STAT /htdocs/abc defg
211-Status of /htdocs/abc defg:
drwxr-xr-x 2 1176838 15000 4096 Apr 5 08:57 .
drwxr-xr-x 24 1176838 15000 4096 Apr 5 09:18 ..
211 End of status
227 Entering Passive Mode (65,254,250,100,158,100)
150 Opening ASCII mode data connection for file list
450 defg-a: No such file or directory