I am not sure if this qualifies as a "bug", but since this section is also meant for things that "look out of place in XenForo", I thought to mention it here. Many if not most newly added methods in xF 1.2 RC miss documentation, such as description, @param and @return. This is unfortunate since it makes it much more difficult for developers to understand the code. This is in contrast to xF 1.1.x, where its source code is quite thoroughly documented. It would be nice if the missing source code documentation were to be added before the final release.