Problem with Junction, Profile just won't continue

Hi,
I've read one the forum and the release notes that there a lot of fixes for various junction problems, I think I found a new one

I've a very unique setup
Windows 7x64 on SSD and various junctions to point my Users and AppData to a second drive which is running in RAID 1, in case something happens, my data would be still available.

But if I use SyncBack to sync two folders, for example
My Music folder on the NAS with my PC, and I use the default user music folder
it would follow this path

C:\Users\<USERNAME>\Music

which works in Explorer and any other app, but Syncback starts the profile copies some files and then stops, the progressbar (animation) and time is still running. And after a while SyncBack freezes and I've to kill the task.

But if I use the direct folder location

D:\Storage\Music

the profile runs without an error.

Why I want to use the junction path? I could use this alternative shortcuts like

%CSIDL_PROFILE%Music\

and then it would be easier to use the profiles on all my machines, even if they don't have two partitions or disks.

Thanks and take care
-Chris