0.4.3 fixes some of mistakes I made in releasing 0.4.2 (some #defines that should not have been there). It also should fix broken handling of JOIN-messages.
Releasing this version was such a pain you wouldn't believe it... (I actually ended up uploading 0.4.3 to sourceforge.net four times. Don't ask, I don't know. I just just all messed up and messed everything up as a result.)
Next time I will _not_ make hasty releases. Keep your fingers crossed.