Manage Collections: TypeError:list of indices must be integers, not unicode

[drMerry]

When I use the manage collections functions on my Sony PRS-650, I get this error:

calibre, version 0.8.8
ERROR: uitzondering niet opgevangen: <b>TypeError</b>:list indices must be integers, not unicode

Traceback (most recent call last):
  File "site-packages\calibre\gui2\actions\edit_collections.py", line 33, in edit_collections
  File "site-packages\calibre\gui2\actions\edit_metadata.py", line 451, in edit_device_collections
  File "site-packages\calibre\gui2\library\models.py", line 1247, in rename_collection
TypeError: list indices must be integers, not unicode

Extra info: The first 2 collections are collections that start with a space, Something Calibre accepts during normal use, but maybe this causes the error. (I want them to be on top of my list at my Reader, without using digits or special characters)

[Charles Haley (cbhaley)]

This hasn't worked for months.

Fix submitted.

[drMerry (invullen)]

(Yesterday was my first time using it on my device ;))