[douche]

This is an option in the client settings - "Enable Tabbed Conversations". I'm pretty sure it defaults to being turned on, because I always have to go in after an update and disable it to get my conversations popping open in separate windows again.

[knz]

> This is an option in the client settings - "Enable Tabbed Conversations"

Which client? The OSX client appears to have very limited configuration options.

[mda590]

The OSX client is quite awful. But, under Preferences > General, there is a "Show conversations in separate windows" option.