I only mention the @username feature as an example. There have been other recent changes, such as the automatic recognition of image files and HTML links.
Are these things being implemented by selecting options available within the SMF program - in the same way that I can select different Preferences in my Profile?
Or are these changes being implemented by modifying the SMF source code?
If it's the latter then IMHO it is sheer madness, and no wonder that there are problems.