The direct linking syntax described in root log: May 2009 was changed, because it was giving us some problems with some HTML validation code that we want to use in order to make impossible to do things like mess up Cream of the Cool with a badly-formed writeup. The only difference is that the disambiguation tag with < and > has become a disambiguation inner link with [ and ]. For example, change [Swap<user>] to [Swap[user]].
We've already automatically converted all the old-style links we could find to the new syntax, but it's possible that a few may have slipped past our nets. Sorry for the noise.