Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
I've just installed 5.2.1 (on Linux) and there do not appear to be any HTML docs. They were there in 5.2.0 (in doc/qtdoc) and I don't remember doing anything special to install them. (Of course, I could have forgotten.)
Any help would be appreciated.