We’ve just updated to the latest version of the Vanilla Forum software.
It caused a few glitches, and a few changes, but seems to be working pretty well again.
Main change is the discussion editor. It is entirely new, but the ability to create content is not that much different. Some points:
Add a link simply by adding a url like this: http://weavertheme.com, or by using the link menu item: http://weavertheme.com/. They don’t seem to display much differently, so it is obviously easiler simply to enter the URL directly.
You can enter links to images from external sites by adding a url to the image (turned down corner page icon) tool: