Issues with multiple IRC accounts

You may have come across an error message stating that your nickname/account is already in use when you connect to an IRC network (via the IRC plugin for conversations and contacts). In my case, I found out that this error was caused by having defined two ICQ accounts that connected to different ICQ networks (IRCnet and Freenode) but that set the same nickname. When I configured the nickname for one of the neworks to a different one, the problem disappeard.