yep, openSUSE11.0, fully updated running on a laptop. Just extracted the tarfile,opened the readme,opened a console,cd’d to the folder & ran the command & up popped a little screen asking me to press F8 to accept terms & conditions,
I just tested it on my laptop and it works fine here as well. I suggest starting over - permissions may have become messed up or something. Redownload the file and extract it into a separate folder, then run ./mugen in the folder.