I have MSN, XMPP, SIPE (with plugin) and Skype (with plugin) in my Pidgin configured. If I open Pidgin through Unity launcher, Unity menu or with autostart sometimes the Pidgin main contact window is hidden. If someone writes a message, the message window appears. Only by killing the task with "kill -9 **" helps and brings the window back to desktop by restart of Pidgin. Only closing Pidgin and starting Pidgin again doesn't work.

Thanks for helping.