Dunno if its suposse to happen in this version but its a kinda boring.
When i minimize the chat windows and if after i open another window, like web browser or something and i minimize it, the minimized chat windows automatically open again.

Just asking because is really boring minize and it getting again in the screen over and over again.

Thanks

Messenger Conversation Has Strange 'Sometimes on top' behaviour

You will also find a workaround there.

Please search forums or at least look at the first couple of threads in the forum before reporting/asking any kind of thing. Thank you.