I recently noticed something while working on a script.

In the image above, the title bar of the terminal says:
mc [tc@E310]:~/Scripting/T_BirdNotifications
but the desktop menu lists that windows title as:
mc [tc
As you can see, everything from the @ sign to the end of the line is missing.
This occurs with flwm_topside.
So my questions are this:
1. Has anyone else seen this on other window managers (openbox, hackedbox, jwm, etc)?
2. Is there any downside to replacing the @ sign in my command prompt?
For example, from this:
tc@E310:~$ To this:
tc(at)E310:~$ Or this:
tc.E310:~$ Or something else?