I have tested M4P v4 installations on all my three machines. It works well on openSUSE 11.1 x86_64 (without 32bit environment added) and on 11.2 i586 on two stationary machines, and even integrates well with Gnomes startmenu.
However on my third machine, a powerful mobile workstation with Core 2 duo T9500 CPU and 4GB RAM with openSUSE 11.2 x86_64, Medusa4P installed - but wouldn't start from the program menu.
Tried also a terminal to run the ./startmedusa script in the master_project, and got the following errors:
mxInterface : received data error
tcsetattr failed error 5
and the Medusa main window never arise.
Do you possibly get the same errors doing the same?