Error 550 with PureFTP on OES11 SP1 with RemoteHomeDirectory

Hi,
we have novell-oes-pure-ftpd installed on OES11 SP1, with "EnableRemoteHomeDirectory yes".
Redirection to the remote homedirectory works as designed but changing into a newly created subdirectory under the homedirectory fails with
"550 Can't change directory to /fileserver4/HOME/home/user23/data: No such file or directory"
This error occurs with any graphical FTP client (FileZilla, WinSCP) but NOT with a CLI-based FTP client.

A leading double shlash is necessary to change to the remote location but the FTP client truncates it to a single slash.
We use the latest version of novell-oes-pure-ftpd-1.0.22-29.13.

Any hints would be appreciated.

Olaf