Index: src/IRCConnection.h
==================================================================
--- src/IRCConnection.h
+++ src/IRCConnection.h
@@ -103,7 +103,8 @@
 - (void)sendNotice: (OFString*)notice
 	 toChannel: (IRCChannel*)channel;
 - (void)kickUser: (IRCUser*)user
      fromChannel: (IRCChannel*)channel
       withReason: (OFString*)reason;
+- (void)changeNicknameTo: (OFString*)nickname;
 - (void)handleConnection;
 @end

Index: src/IRCConnection.m
==================================================================
--- src/IRCConnection.m
+++ src/IRCConnection.m
@@ -155,10 +155,15 @@
       withReason: (OFString*)reason
 {
 	[self sendLineWithFormat: @"KICK %@ %@ :%@",
 				  channel.name, user.nickname, reason];
 }
+
+- (void)changeNicknameTo: (OFString*)nickname_
+{
+	[self sendLineWithFormat: @"NICK %@", nickname_];
+}
 
 - (void)handleConnection
 {
 	OFAutoreleasePool *pool = [[OFAutoreleasePool alloc] init];
 	OFString *line;
@@ -335,10 +340,15 @@
 			    of_range(1, who.length - 1)];
 			newNickname = [newNickname substringWithRange:
 			    of_range(1, newNickname.length - 1)];
 
 			user = [IRCUser IRCUserWithString: who];
+
+			if ([user.nickname isEqual: nickname]) {
+				[nickname release];
+				nickname = [user.nickname copy];
+			}
 
 			if ([delegate respondsToSelector:
 			    @selector(connection:didSeeUser:changeNicknameTo:)])
 				[delegate connection: self
 					  didSeeUser: user