The integrated IRC client was improved, notably to ease the discussions via private message, as you can see HERE and HERE. (Actually, this improvement was introduced in the 3.0.5 version but 3.0.7 one was released only few days later)

Due to some issues with the PlayOnLinux's IRC server, the integrated IRC client now connects you directly at irc.freenode.com, on the #playonlinux channel other new thing, independent from the POL's version: there is one channel per language. So you can now join one of the following channels, depending on the language you want to speak:

#playonlinux-fr
#playonlinux-it
#playonlinux-pl
#playonlinux-ru
#playonlinux-hu
#playonlinux-es