It's not possible to move a subfolder within a shared folder hirachy:

[shared folder]
 -[subfolder A]
  -[subfolder 1]
 -[subfolder B]
I want to move [subfolder 1] from [subfolder A] to [subfolder B] - but I can't

I can create [subfolder 2] within [subfolder B], I even can delete [subfolder 1], but I can't move it!

This must be a known bug - but I couldn't find it in bugzilla ...