In my chat logs, some of the things I (or another person in the conversation) say in a multiperson conversation appears as if another person said it (only it doesn't have a colon next to it) . That is, if this is the conversation:

A Person: goodbye
B Person: bye

This is the wrong logged chat log:

A Person: goodbye
A Person bye

Can this problem be solved somehow?

I use: MSN 7.0.0813
Msg Plus 3.54.132
And also StuffPlug 2.2.229

Double check this and i'm sure patchou will look into it

Does this happen only in multi-person chats? also, can you find one reason that seems to provoke the problem?

For now I've seen it only in one conversation, and that was a multi-person one.  But it happened a lot of times in that conversations log. It may have been the major number of people in that conversation. Maybe it only happens in long and crowded conversations.