While DNS is technically case-insensitive, hostnames are traditionally expressed in all-lower case. ipcalc figures out hostnames by doing a reverse lookup, which is generally ok, but some DNS servers are (aesthetically speaking) misconfigured such that they return ALL CAPS or even MiXeD cAsE. ipcalc should default to lower-casing this string before setting hostname values. (Fixing the DNS servers would be the ideal, but often those are admin'd from On High and can't/won't easily be changed.)
Done in 5.60-1. I think it's somewhat silly, though. ;)
Wonderful, thanks. :)