[mew-int 01175] limitations on character usage in config names?

[sen_ml at example.com]

Hi,

I have not been able to access $inbox for one of my cases, while I am
able to access $inbox for a different case.  FWIW, I am able to invoke
"i" for both cases and I was able to use +mdrop for both immediately
prior to upgrading to 3.1.

At this point, the only idea that comes to mind is that the case that
doesn't work uses the character "@" in the case name, while the one
for which it does work does not use "@" in the case name.  A wild
guess, perhaps (-;

Any ideas what I might be doing wrong?

Thanks for any help.