> > Did you have both symbols before version 2.2? > > Yes. And actually I have both symbols in Debian stable, where I run > tmux version 2.2-1~bpo8+1 from backports. Also, I checked with > someone running Debian unstable, and they get also both symbols.
My fault. I didn’t restart the server after updating. The activity symbol supersedes the bell symbol also in Debian stable. I upgraded to version 2.3~git20160506-1 and have again only one symbol. A downgrade to version 1.9-6 gave me again both symbols. (I couldn’t check for version 2.1 since the deb file is no longer on the server.) I have no idea what is going on … Best, Marcel