Does this happen every time for you? There should be one line height worth of blank space (like the first screen cap), and that's all I see when chatting.
No, this is the first time I have seen this behaviour the first screenshot was right after resizing the window, it returned to normal, then reappeared as you can see in the second screenshot after those two lines of text. I suspect this quirk was triggered by the set of steam items that were sent shortly before. There is also a small chance that the non-rendered characters in johndrinkwater's alias also are involved.
OK, we'll keep any eye out for it.
I still had my repro of the non-rendering characters active so I was using a name with a penguin in it and no font support. I don't believe that's part of the issue.
The spacing changes when receiving a steam inventory message in the chat and re-occurs when any message is received after the inventory message.
Closing as not recently seen / low priority.
Nothing extracted yet.
As far as I know, the extra whitespace is new behavior:
![Screenshot from 2013-02-13 19:06:47]()
![Screenshot from 2013-02-13 19:09:08]()
Let me know if any other relevant information is needed.