Comment 13 for bug 525552

This bug affects me also, system is running an older CentOS.
I noticed it in byobu 3.1 (and still affects 3.3) which was a configure && make && make install job of the release tarball.
Like the submitter, I run this as "byobu" from the shell, and only PS1 seems to be affected.
It didn't happen in byobu 2.82 from the "other systems build" download on the ppa site (which was the pre-built version which ran as "screen" and overwrote ~/.screenrc to load byobu settings instead)

Its a tad annoying to have to "grep PS1 ~/.bash_profile" and cut & paste that line in for every opened window.

I'm wondering if something in the CentOS build of bash or screen or rxvt is doing something stupid, as I've checked out byobu
(grepping for 'exec' 'env' 'set' 'prompt' and 'ps1') and its consistently running os.execv (so not overwriting the environment) or otherwise messing with PS1.