encyclo - 9:14 pm on Jan 6, 2011 (gmt 0)

The problem is not with the FTP client, it is with the operating system. Windows file and directory names are case-insensitive, Unix-based operating systems are case-sensitive. There is nothing you can do to maintain case-sensitivity in Windows, and as the OS can't distinguish between C and c, then no Windows FTP program can either.