2.3.3 is a minor maintenance release which brings some fixes related to forums with weird character encoding. Earlier it was impossible to subscribe forums with some bizarre Russian windows encoding but now it should work. Character encoding is now handled with QTextCodec which supports a large number of encodings.
If you are a forum owner, use UTF-8. Everything else is deprecated and just causes trouble.
This release is built for Ubuntu and Windows. Mac builder is still wanted.