Thank you for some nice blog software, which I have been a happy user of for quite some time.
Yesterday I finally upgraded to version 2.5 and noticed that the RSS icons of my category list was turned on. I usually turn them off because I want to limit subscriptions to my FeedBurner feed.
Anyway, I had a look at the source code and I think a line, that adds the new value back into the dictionary may be missing after
blogsShowRssIcon.Remove in the ShowRssIcon property setter in the CategoryList control.
This will make the method look like this (the italic line is not currently there):
if (ShowRssIcon == value)
I may or may not have understood how the controls interact with their settings, which is why I am posting this issue here. :-)
Regardless of the above, as I see it, there is currently no way to turn off the RSS icons in the CategoryList control.
I hope this helps in some way.