Just tried this - deleted the plugin from ~/Library/Application Support/Adium 2.0/Plugins (Disabled)/ then made the info.plist change, and now works again.

Works for me, and as I'm not intending to use another theme this fix is enough. Thanks!

They do show up in the transcript though. And if I send something that looks like a smiley but isn't, such as :0 instead of :o it gets through fine.

No - they've been working fine in other themes today, just not in this one. I can see the text of the emoticon come in through growl, but not in Adium. Also, if I send the message

. :)

then only the '.' bit shows up on my screen, though the smiley gets through at the other end.

I love your theme, but the emoticons aren't showing up in my chats. At first I guessed that was the minimalist styling you were after (which is fine), but I don't see anything at all, not even the raw characters. I find them essential for IM to get tone across. Is there a problem with the theme, or with me? :)