Could you use some extra spacing between the sent vs incoming messages in the chat window?
Or use the native sailfish chat layout?

Small bug;
emails are not shown correctly in the chat window if following format is used: <firstname>.<lastname>@provider.com ; the link is only active on the part after the "."

Also phone rebooted after I launched the app (latest version)
Don't if it has something to do with this one but didnt do anything else...