1.0b19 fails to open about blacktree-secrets HOT 5 OPEN

As additional information, when trying to load the Secrets pane, the following 
appears in the Console:

6/3/08 11:19:51 AM System Preferences[20168] *** -[NSCFString containsObject:]: 
unrecognized selector 
sent to instance 0x9a0c00 
6/3/08 11:19:51 AM System Preferences[20168] *** -[NSCFString containsObject:]: 
unrecognized selector 
sent to instance 0x9a0c00 
6/3/08 11:19:51 AM System Preferences[20168] *** -[NSCFString containsObject:]: 
unrecognized selector 
sent to instance 0x9a0c00 

These messages do not appear with 1.0b18.

I have noticed an error when looking to see if there is an update from 1.0b19

On my system, it complains about a XML list error, so it can't load it, and 
then keeps BEEP'ing like crazy!
Dismissing the dialog with the OK button, just makes it come back, with more 
beeps.

Go download 1.0.0 from the website and see if it fares better. Quit system 
preferences first.

I am having this same issue on OS X 10.6.1 using Secrets 1.0.6