I have same issue with Ubuntu 10.04 + Empathy 2.30.1. Like sayd, when a arriving message contains newline character (I let my chat buddy do shift+enter in WLM to test) it won't show up in chat window. It will shot up in chat log and when the chat window ain't focussed a notification popup will also show the message. It just ain't showing up in the chat window with the "Ubuntu" theme. Switching to classic fixed it also for me.
I have same issue with Ubuntu 10.04 + Empathy 2.30.1. Like sayd, when a arriving message contains newline character (I let my chat buddy do shift+enter in WLM to test) it won't show up in chat window. It will shot up in chat log and when the chat window ain't focussed a notification popup will also show the message. It just ain't showing up in the chat window with the "Ubuntu" theme. Switching to classic fixed it also for me.