Folder Redirection not working on SMB Network Home Directories

I've setup network home directories on a 10.7.3 server. NHDs are available via SMB currently. I'm trying to setup folder redirection via MCXRedirector for both the ~/Library/Cache folder and ~/Downloads and redirect them to the local client. Client is 10.7.3 joined to OD. I'm using Login Redirection and the option to delete the existing folder and create a symlink. I used these instructions to create the redirectors: http://www.afp548.com/article.php?story=MCXRedirector

When NHDs are available via SMB, the folders are created on the local client, but the symlinks aren't created in the NHD. I can switch the NHDs to be available via AFP, and then it works fine. I can switch back to SMB and the symlink stays in place and appears to work with no issue.

Am I missing something here? I can't find any documentation that says I can't use MCXRedirector with SMB shares, and I see a number of posts where it appears that people are using it successfully... so I'm not sure what is wrong? Any help or suggestions is appreciated.