Usually one bird will chase any others away. I've seen them gathering with more than one in the feeder several times in the past couple of weeks. Some of the birds are learning to get along with each other.
I have been using b:css='false' for some time so as to be able to simplify the CSS style rules used, so I thought I'd try its counterpart - b:js='false' - in the head of the document, in the html tag. Doing so caused the "Total Pageviews" gadget not to work. That was the only problem I notice…