Lately, the Linux sound subsystem has been "enhanced" into a state of disrepair. Under FC4, after running the Windows version, morse.exe (under Wine, of course), the Linux version's sound becomes garbled. I suspect the same behaviour may occur in other circumstances, as well.
For me, a workaround (under bash) is to:
into the environment. Perhaps some Gnome or KDE guru will describe how to make the equivalent voodoo in that context.