GLib-GObject-WARNING

[Claude Jones]

My first post to this list. Thanks for your work to the developers.
I'm running smart on two FC4 boxes. I'm getting the same error/warning 
messages on both in the log window which pops it up each time I do an update:
(smart:2068): GLib-GObject-WARNING **: invalid cast from `GtkTreeView' to 
`GtkRange
Can someone tell me what this means? I've found some references to this with 
Google searches, but they weren't too helpful...
-- 
Claude Jones
Bluemont, VA, USA